diff --git a/benchmarks/msgq/1.0/Android.bp b/benchmarks/msgq/1.0/Android.bp
index de84e81..7f8ea99 100644
--- a/benchmarks/msgq/1.0/Android.bp
+++ b/benchmarks/msgq/1.0/Android.bp
@@ -12,7 +12,7 @@
     tools: ["hidl-gen"],
     cmd: "$(location hidl-gen) -o $(genDir) -Lc++ -randroid.hardware:hardware/interfaces -randroid.hidl:system/libhidl/transport android.hardware.benchmarks.msgq@1.0",
     srcs: [
-        "IBenchmarkMsgQ.hal",
+        ":android.hardware.benchmarks.msgq@1.0_hal",
     ],
     out: [
         "android/hardware/benchmarks/msgq/1.0/BenchmarkMsgQAll.cpp",
@@ -24,7 +24,7 @@
     tools: ["hidl-gen"],
     cmd: "$(location hidl-gen) -o $(genDir) -Lc++ -randroid.hardware:hardware/interfaces -randroid.hidl:system/libhidl/transport android.hardware.benchmarks.msgq@1.0",
     srcs: [
-        "IBenchmarkMsgQ.hal",
+        ":android.hardware.benchmarks.msgq@1.0_hal",
     ],
     out: [
         "android/hardware/benchmarks/msgq/1.0/IBenchmarkMsgQ.h",
diff --git a/bluetooth/1.0/Android.bp b/bluetooth/1.0/Android.bp
index f2c394b..2373ceb 100644
--- a/bluetooth/1.0/Android.bp
+++ b/bluetooth/1.0/Android.bp
@@ -14,9 +14,7 @@
     tools: ["hidl-gen"],
     cmd: "$(location hidl-gen) -o $(genDir) -Lc++ -randroid.hardware:hardware/interfaces -randroid.hidl:system/libhidl/transport android.hardware.bluetooth@1.0",
     srcs: [
-        "types.hal",
-        "IBluetoothHci.hal",
-        "IBluetoothHciCallbacks.hal",
+        ":android.hardware.bluetooth@1.0_hal",
     ],
     out: [
         "android/hardware/bluetooth/1.0/types.cpp",
@@ -30,9 +28,7 @@
     tools: ["hidl-gen"],
     cmd: "$(location hidl-gen) -o $(genDir) -Lc++ -randroid.hardware:hardware/interfaces -randroid.hidl:system/libhidl/transport android.hardware.bluetooth@1.0",
     srcs: [
-        "types.hal",
-        "IBluetoothHci.hal",
-        "IBluetoothHciCallbacks.hal",
+        ":android.hardware.bluetooth@1.0_hal",
     ],
     out: [
         "android/hardware/bluetooth/1.0/types.h",
diff --git a/boot/1.0/Android.bp b/boot/1.0/Android.bp
index 9dcabc4..7265cc2 100644
--- a/boot/1.0/Android.bp
+++ b/boot/1.0/Android.bp
@@ -13,8 +13,7 @@
     tools: ["hidl-gen"],
     cmd: "$(location hidl-gen) -o $(genDir) -Lc++ -randroid.hardware:hardware/interfaces -randroid.hidl:system/libhidl/transport android.hardware.boot@1.0",
     srcs: [
-        "types.hal",
-        "IBootControl.hal",
+        ":android.hardware.boot@1.0_hal",
     ],
     out: [
         "android/hardware/boot/1.0/types.cpp",
@@ -27,8 +26,7 @@
     tools: ["hidl-gen"],
     cmd: "$(location hidl-gen) -o $(genDir) -Lc++ -randroid.hardware:hardware/interfaces -randroid.hidl:system/libhidl/transport android.hardware.boot@1.0",
     srcs: [
-        "types.hal",
-        "IBootControl.hal",
+        ":android.hardware.boot@1.0_hal",
     ],
     out: [
         "android/hardware/boot/1.0/types.h",
diff --git a/ir/1.0/Android.bp b/ir/1.0/Android.bp
index 5628952..da49579 100644
--- a/ir/1.0/Android.bp
+++ b/ir/1.0/Android.bp
@@ -13,8 +13,7 @@
     tools: ["hidl-gen"],
     cmd: "$(location hidl-gen) -o $(genDir) -Lc++ -randroid.hardware:hardware/interfaces -randroid.hidl:system/libhidl/transport android.hardware.ir@1.0",
     srcs: [
-        "types.hal",
-        "IConsumerIr.hal",
+        ":android.hardware.ir@1.0_hal",
     ],
     out: [
         "android/hardware/ir/1.0/types.cpp",
@@ -27,8 +26,7 @@
     tools: ["hidl-gen"],
     cmd: "$(location hidl-gen) -o $(genDir) -Lc++ -randroid.hardware:hardware/interfaces -randroid.hidl:system/libhidl/transport android.hardware.ir@1.0",
     srcs: [
-        "types.hal",
-        "IConsumerIr.hal",
+        ":android.hardware.ir@1.0_hal",
     ],
     out: [
         "android/hardware/ir/1.0/types.h",
diff --git a/nfc/1.0/Android.bp b/nfc/1.0/Android.bp
index 7f228a7..e7305b4 100644
--- a/nfc/1.0/Android.bp
+++ b/nfc/1.0/Android.bp
@@ -14,9 +14,7 @@
     tools: ["hidl-gen"],
     cmd: "$(location hidl-gen) -o $(genDir) -Lc++ -randroid.hardware:hardware/interfaces -randroid.hidl:system/libhidl/transport android.hardware.nfc@1.0",
     srcs: [
-        "types.hal",
-        "INfc.hal",
-        "INfcClientCallback.hal",
+        ":android.hardware.nfc@1.0_hal",
     ],
     out: [
         "android/hardware/nfc/1.0/types.cpp",
@@ -30,9 +28,7 @@
     tools: ["hidl-gen"],
     cmd: "$(location hidl-gen) -o $(genDir) -Lc++ -randroid.hardware:hardware/interfaces -randroid.hidl:system/libhidl/transport android.hardware.nfc@1.0",
     srcs: [
-        "types.hal",
-        "INfc.hal",
-        "INfcClientCallback.hal",
+        ":android.hardware.nfc@1.0_hal",
     ],
     out: [
         "android/hardware/nfc/1.0/types.h",
diff --git a/radio/1.0/Android.bp b/radio/1.0/Android.bp
index d9df910..f59cf66 100644
--- a/radio/1.0/Android.bp
+++ b/radio/1.0/Android.bp
@@ -17,12 +17,7 @@
     tools: ["hidl-gen"],
     cmd: "$(location hidl-gen) -o $(genDir) -Lc++ -randroid.hardware:hardware/interfaces -randroid.hidl:system/libhidl/transport android.hardware.radio@1.0",
     srcs: [
-        "types.hal",
-        "IRadio.hal",
-        "IRadioIndication.hal",
-        "IRadioResponse.hal",
-        "ISap.hal",
-        "ISapCallback.hal",
+        ":android.hardware.radio@1.0_hal",
     ],
     out: [
         "android/hardware/radio/1.0/types.cpp",
@@ -39,12 +34,7 @@
     tools: ["hidl-gen"],
     cmd: "$(location hidl-gen) -o $(genDir) -Lc++ -randroid.hardware:hardware/interfaces -randroid.hidl:system/libhidl/transport android.hardware.radio@1.0",
     srcs: [
-        "types.hal",
-        "IRadio.hal",
-        "IRadioIndication.hal",
-        "IRadioResponse.hal",
-        "ISap.hal",
-        "ISapCallback.hal",
+        ":android.hardware.radio@1.0_hal",
     ],
     out: [
         "android/hardware/radio/1.0/types.h",
diff --git a/radio/1.0/Android.mk b/radio/1.0/Android.mk
index 7f4c7d4..9e9588a 100644
--- a/radio/1.0/Android.mk
+++ b/radio/1.0/Android.mk
@@ -74,6 +74,25 @@
 LOCAL_GENERATED_SOURCES += $(GEN)
 
 #
+# Build types.hal (ApnTypes)
+#
+GEN := $(intermediates)/android/hardware/radio/V1_0/ApnTypes.java
+$(GEN): $(HIDL)
+$(GEN): PRIVATE_HIDL := $(HIDL)
+$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/types.hal
+$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
+$(GEN): PRIVATE_CUSTOM_TOOL = \
+        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
+        -Ljava \
+        -randroid.hardware:hardware/interfaces \
+        -randroid.hidl:system/libhidl/transport \
+        android.hardware.radio@1.0::types.ApnTypes
+
+$(GEN): $(LOCAL_PATH)/types.hal
+	$(transform-generated-source)
+LOCAL_GENERATED_SOURCES += $(GEN)
+
+#
 # Build types.hal (AppState)
 #
 GEN := $(intermediates)/android/hardware/radio/V1_0/AppState.java
@@ -3089,6 +3108,25 @@
 LOCAL_GENERATED_SOURCES += $(GEN)
 
 #
+# Build types.hal (ApnTypes)
+#
+GEN := $(intermediates)/android/hardware/radio/V1_0/ApnTypes.java
+$(GEN): $(HIDL)
+$(GEN): PRIVATE_HIDL := $(HIDL)
+$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/types.hal
+$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
+$(GEN): PRIVATE_CUSTOM_TOOL = \
+        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
+        -Ljava \
+        -randroid.hardware:hardware/interfaces \
+        -randroid.hidl:system/libhidl/transport \
+        android.hardware.radio@1.0::types.ApnTypes
+
+$(GEN): $(LOCAL_PATH)/types.hal
+	$(transform-generated-source)
+LOCAL_GENERATED_SOURCES += $(GEN)
+
+#
 # Build types.hal (AppState)
 #
 GEN := $(intermediates)/android/hardware/radio/V1_0/AppState.java
diff --git a/tests/bar/1.0/Android.bp b/tests/bar/1.0/Android.bp
index 924b3ab..694804c 100644
--- a/tests/bar/1.0/Android.bp
+++ b/tests/bar/1.0/Android.bp
@@ -17,12 +17,7 @@
     tools: ["hidl-gen"],
     cmd: "$(location hidl-gen) -o $(genDir) -Lc++ -randroid.hardware:hardware/interfaces -randroid.hidl:system/libhidl/transport android.hardware.tests.bar@1.0",
     srcs: [
-        "types.hal",
-        "IBar.hal",
-        "IComplicated.hal",
-        "IFooCallback.hal",
-        "IImportRules.hal",
-        "IImportTypes.hal",
+        ":android.hardware.tests.bar@1.0_hal",
     ],
     out: [
         "android/hardware/tests/bar/1.0/types.cpp",
@@ -39,12 +34,7 @@
     tools: ["hidl-gen"],
     cmd: "$(location hidl-gen) -o $(genDir) -Lc++ -randroid.hardware:hardware/interfaces -randroid.hidl:system/libhidl/transport android.hardware.tests.bar@1.0",
     srcs: [
-        "types.hal",
-        "IBar.hal",
-        "IComplicated.hal",
-        "IFooCallback.hal",
-        "IImportRules.hal",
-        "IImportTypes.hal",
+        ":android.hardware.tests.bar@1.0_hal",
     ],
     out: [
         "android/hardware/tests/bar/1.0/types.h",
diff --git a/tests/baz/1.0/Android.bp b/tests/baz/1.0/Android.bp
index 1cf71b6..7939444 100644
--- a/tests/baz/1.0/Android.bp
+++ b/tests/baz/1.0/Android.bp
@@ -15,10 +15,7 @@
     tools: ["hidl-gen"],
     cmd: "$(location hidl-gen) -o $(genDir) -Lc++ -randroid.hardware:hardware/interfaces -randroid.hidl:system/libhidl/transport android.hardware.tests.baz@1.0",
     srcs: [
-        "types.hal",
-        "IBase.hal",
-        "IBaz.hal",
-        "IBazCallback.hal",
+        ":android.hardware.tests.baz@1.0_hal",
     ],
     out: [
         "android/hardware/tests/baz/1.0/types.cpp",
@@ -33,10 +30,7 @@
     tools: ["hidl-gen"],
     cmd: "$(location hidl-gen) -o $(genDir) -Lc++ -randroid.hardware:hardware/interfaces -randroid.hidl:system/libhidl/transport android.hardware.tests.baz@1.0",
     srcs: [
-        "types.hal",
-        "IBase.hal",
-        "IBaz.hal",
-        "IBazCallback.hal",
+        ":android.hardware.tests.baz@1.0_hal",
     ],
     out: [
         "android/hardware/tests/baz/1.0/types.h",
diff --git a/tests/expression/1.0/Android.bp b/tests/expression/1.0/Android.bp
index 1730aba..5279503 100644
--- a/tests/expression/1.0/Android.bp
+++ b/tests/expression/1.0/Android.bp
@@ -13,8 +13,7 @@
     tools: ["hidl-gen"],
     cmd: "$(location hidl-gen) -o $(genDir) -Lc++ -randroid.hardware:hardware/interfaces -randroid.hidl:system/libhidl/transport android.hardware.tests.expression@1.0",
     srcs: [
-        "IExpression.hal",
-        "IExpressionExt.hal",
+        ":android.hardware.tests.expression@1.0_hal",
     ],
     out: [
         "android/hardware/tests/expression/1.0/ExpressionAll.cpp",
@@ -27,8 +26,7 @@
     tools: ["hidl-gen"],
     cmd: "$(location hidl-gen) -o $(genDir) -Lc++ -randroid.hardware:hardware/interfaces -randroid.hidl:system/libhidl/transport android.hardware.tests.expression@1.0",
     srcs: [
-        "IExpression.hal",
-        "IExpressionExt.hal",
+        ":android.hardware.tests.expression@1.0_hal",
     ],
     out: [
         "android/hardware/tests/expression/1.0/IExpression.h",
diff --git a/tests/foo/1.0/Android.bp b/tests/foo/1.0/Android.bp
index c65d3cf..9572855 100644
--- a/tests/foo/1.0/Android.bp
+++ b/tests/foo/1.0/Android.bp
@@ -17,12 +17,7 @@
     tools: ["hidl-gen"],
     cmd: "$(location hidl-gen) -o $(genDir) -Lc++ -randroid.hardware:hardware/interfaces -randroid.hidl:system/libhidl/transport android.hardware.tests.foo@1.0",
     srcs: [
-        "types.hal",
-        "IFoo.hal",
-        "IFooCallback.hal",
-        "IMyTypes.hal",
-        "ISimple.hal",
-        "ITheirTypes.hal",
+        ":android.hardware.tests.foo@1.0_hal",
     ],
     out: [
         "android/hardware/tests/foo/1.0/types.cpp",
@@ -39,12 +34,7 @@
     tools: ["hidl-gen"],
     cmd: "$(location hidl-gen) -o $(genDir) -Lc++ -randroid.hardware:hardware/interfaces -randroid.hidl:system/libhidl/transport android.hardware.tests.foo@1.0",
     srcs: [
-        "types.hal",
-        "IFoo.hal",
-        "IFooCallback.hal",
-        "IMyTypes.hal",
-        "ISimple.hal",
-        "ITheirTypes.hal",
+        ":android.hardware.tests.foo@1.0_hal",
     ],
     out: [
         "android/hardware/tests/foo/1.0/types.h",
diff --git a/tests/inheritance/1.0/Android.bp b/tests/inheritance/1.0/Android.bp
index 433e9ac..f50aee4 100644
--- a/tests/inheritance/1.0/Android.bp
+++ b/tests/inheritance/1.0/Android.bp
@@ -15,10 +15,7 @@
     tools: ["hidl-gen"],
     cmd: "$(location hidl-gen) -o $(genDir) -Lc++ -randroid.hardware:hardware/interfaces -randroid.hidl:system/libhidl/transport android.hardware.tests.inheritance@1.0",
     srcs: [
-        "IChild.hal",
-        "IFetcher.hal",
-        "IGrandparent.hal",
-        "IParent.hal",
+        ":android.hardware.tests.inheritance@1.0_hal",
     ],
     out: [
         "android/hardware/tests/inheritance/1.0/ChildAll.cpp",
@@ -33,10 +30,7 @@
     tools: ["hidl-gen"],
     cmd: "$(location hidl-gen) -o $(genDir) -Lc++ -randroid.hardware:hardware/interfaces -randroid.hidl:system/libhidl/transport android.hardware.tests.inheritance@1.0",
     srcs: [
-        "IChild.hal",
-        "IFetcher.hal",
-        "IGrandparent.hal",
-        "IParent.hal",
+        ":android.hardware.tests.inheritance@1.0_hal",
     ],
     out: [
         "android/hardware/tests/inheritance/1.0/IChild.h",
diff --git a/tests/libhwbinder/1.0/Android.bp b/tests/libhwbinder/1.0/Android.bp
index 1d0b4b5..580e961 100644
--- a/tests/libhwbinder/1.0/Android.bp
+++ b/tests/libhwbinder/1.0/Android.bp
@@ -12,7 +12,7 @@
     tools: ["hidl-gen"],
     cmd: "$(location hidl-gen) -o $(genDir) -Lc++ -randroid.hardware:hardware/interfaces -randroid.hidl:system/libhidl/transport android.hardware.tests.libhwbinder@1.0",
     srcs: [
-        "IBenchmark.hal",
+        ":android.hardware.tests.libhwbinder@1.0_hal",
     ],
     out: [
         "android/hardware/tests/libhwbinder/1.0/BenchmarkAll.cpp",
@@ -24,7 +24,7 @@
     tools: ["hidl-gen"],
     cmd: "$(location hidl-gen) -o $(genDir) -Lc++ -randroid.hardware:hardware/interfaces -randroid.hidl:system/libhidl/transport android.hardware.tests.libhwbinder@1.0",
     srcs: [
-        "IBenchmark.hal",
+        ":android.hardware.tests.libhwbinder@1.0_hal",
     ],
     out: [
         "android/hardware/tests/libhwbinder/1.0/IBenchmark.h",
diff --git a/tests/memory/1.0/Android.bp b/tests/memory/1.0/Android.bp
index 3f27810..49faf41 100644
--- a/tests/memory/1.0/Android.bp
+++ b/tests/memory/1.0/Android.bp
@@ -12,7 +12,7 @@
     tools: ["hidl-gen"],
     cmd: "$(location hidl-gen) -o $(genDir) -Lc++ -randroid.hardware:hardware/interfaces -randroid.hidl:system/libhidl/transport android.hardware.tests.memory@1.0",
     srcs: [
-        "IMemoryTest.hal",
+        ":android.hardware.tests.memory@1.0_hal",
     ],
     out: [
         "android/hardware/tests/memory/1.0/MemoryTestAll.cpp",
@@ -24,7 +24,7 @@
     tools: ["hidl-gen"],
     cmd: "$(location hidl-gen) -o $(genDir) -Lc++ -randroid.hardware:hardware/interfaces -randroid.hidl:system/libhidl/transport android.hardware.tests.memory@1.0",
     srcs: [
-        "IMemoryTest.hal",
+        ":android.hardware.tests.memory@1.0_hal",
     ],
     out: [
         "android/hardware/tests/memory/1.0/IMemoryTest.h",
diff --git a/tests/msgq/1.0/Android.bp b/tests/msgq/1.0/Android.bp
index 39fef89..d17efe4 100644
--- a/tests/msgq/1.0/Android.bp
+++ b/tests/msgq/1.0/Android.bp
@@ -12,7 +12,7 @@
     tools: ["hidl-gen"],
     cmd: "$(location hidl-gen) -o $(genDir) -Lc++ -randroid.hardware:hardware/interfaces -randroid.hidl:system/libhidl/transport android.hardware.tests.msgq@1.0",
     srcs: [
-        "ITestMsgQ.hal",
+        ":android.hardware.tests.msgq@1.0_hal",
     ],
     out: [
         "android/hardware/tests/msgq/1.0/TestMsgQAll.cpp",
@@ -24,7 +24,7 @@
     tools: ["hidl-gen"],
     cmd: "$(location hidl-gen) -o $(genDir) -Lc++ -randroid.hardware:hardware/interfaces -randroid.hidl:system/libhidl/transport android.hardware.tests.msgq@1.0",
     srcs: [
-        "ITestMsgQ.hal",
+        ":android.hardware.tests.msgq@1.0_hal",
     ],
     out: [
         "android/hardware/tests/msgq/1.0/ITestMsgQ.h",
diff --git a/tests/pointer/1.0/Android.bp b/tests/pointer/1.0/Android.bp
index e40003d..7f66e2a 100644
--- a/tests/pointer/1.0/Android.bp
+++ b/tests/pointer/1.0/Android.bp
@@ -13,8 +13,7 @@
     tools: ["hidl-gen"],
     cmd: "$(location hidl-gen) -o $(genDir) -Lc++ -randroid.hardware:hardware/interfaces -randroid.hidl:system/libhidl/transport android.hardware.tests.pointer@1.0",
     srcs: [
-        "IGraph.hal",
-        "IPointer.hal",
+        ":android.hardware.tests.pointer@1.0_hal",
     ],
     out: [
         "android/hardware/tests/pointer/1.0/GraphAll.cpp",
@@ -27,8 +26,7 @@
     tools: ["hidl-gen"],
     cmd: "$(location hidl-gen) -o $(genDir) -Lc++ -randroid.hardware:hardware/interfaces -randroid.hidl:system/libhidl/transport android.hardware.tests.pointer@1.0",
     srcs: [
-        "IGraph.hal",
-        "IPointer.hal",
+        ":android.hardware.tests.pointer@1.0_hal",
     ],
     out: [
         "android/hardware/tests/pointer/1.0/IGraph.h",
diff --git a/wifi/1.0/Android.bp b/wifi/1.0/Android.bp
index 59326d0..2319999 100644
--- a/wifi/1.0/Android.bp
+++ b/wifi/1.0/Android.bp
@@ -25,20 +25,7 @@
     tools: ["hidl-gen"],
     cmd: "$(location hidl-gen) -o $(genDir) -Lc++ -randroid.hardware:hardware/interfaces -randroid.hidl:system/libhidl/transport android.hardware.wifi@1.0",
     srcs: [
-        "types.hal",
-        "IWifi.hal",
-        "IWifiApIface.hal",
-        "IWifiChip.hal",
-        "IWifiChipEventCallback.hal",
-        "IWifiEventCallback.hal",
-        "IWifiIface.hal",
-        "IWifiNanIface.hal",
-        "IWifiNanIfaceEventCallback.hal",
-        "IWifiP2pIface.hal",
-        "IWifiRttController.hal",
-        "IWifiRttControllerEventCallback.hal",
-        "IWifiStaIface.hal",
-        "IWifiStaIfaceEventCallback.hal",
+        ":android.hardware.wifi@1.0_hal",
     ],
     out: [
         "android/hardware/wifi/1.0/types.cpp",
@@ -63,20 +50,7 @@
     tools: ["hidl-gen"],
     cmd: "$(location hidl-gen) -o $(genDir) -Lc++ -randroid.hardware:hardware/interfaces -randroid.hidl:system/libhidl/transport android.hardware.wifi@1.0",
     srcs: [
-        "types.hal",
-        "IWifi.hal",
-        "IWifiApIface.hal",
-        "IWifiChip.hal",
-        "IWifiChipEventCallback.hal",
-        "IWifiEventCallback.hal",
-        "IWifiIface.hal",
-        "IWifiNanIface.hal",
-        "IWifiNanIfaceEventCallback.hal",
-        "IWifiP2pIface.hal",
-        "IWifiRttController.hal",
-        "IWifiRttControllerEventCallback.hal",
-        "IWifiStaIface.hal",
-        "IWifiStaIfaceEventCallback.hal",
+        ":android.hardware.wifi@1.0_hal",
     ],
     out: [
         "android/hardware/wifi/1.0/types.h",
diff --git a/wifi/1.0/IWifiNanIface.hal b/wifi/1.0/IWifiNanIface.hal
index 271da22..450fba0 100644
--- a/wifi/1.0/IWifiNanIface.hal
+++ b/wifi/1.0/IWifiNanIface.hal
@@ -122,7 +122,7 @@
    *         |WifiStatusCode.ERROR_WIFI_IFACE_INVALID|,
    *         |WifiStatusCode.ERROR_UNKNOWN|
    */
-  stopPublishRequest(CommandIdShort cmdId, uint16_t sessionId)
+  stopPublishRequest(CommandIdShort cmdId, uint8_t sessionId)
       generates (WifiStatus status);
 
   /**
@@ -151,7 +151,7 @@
    *         |WifiStatusCode.ERROR_WIFI_IFACE_INVALID|,
    *         |WifiStatusCode.ERROR_UNKNOWN|
    */
-  stopSubscribeRequest(CommandIdShort cmdId, uint16_t sessionId)
+  stopSubscribeRequest(CommandIdShort cmdId, uint8_t sessionId)
       generates (WifiStatus status);
 
   /**
diff --git a/wifi/1.0/IWifiNanIfaceEventCallback.hal b/wifi/1.0/IWifiNanIfaceEventCallback.hal
index 2f06869..c9fea8f 100644
--- a/wifi/1.0/IWifiNanIfaceEventCallback.hal
+++ b/wifi/1.0/IWifiNanIfaceEventCallback.hal
@@ -79,7 +79,7 @@
    *        |NanStatusType.INVALID_SESSION_ID|
    * @param sessionId ID of the new publish session (if successfully created).
    */
-  oneway notifyStartPublishResponse(CommandIdShort id, WifiNanStatus status, uint16_t sessionId);
+  oneway notifyStartPublishResponse(CommandIdShort id, WifiNanStatus status, uint8_t sessionId);
 
   /**
    * Callback invoked in response to a stop publish request |stopPublishRequest|.
@@ -104,7 +104,7 @@
    *        |NanStatusType.INVALID_SESSION_ID|
    * @param sessionId ID of the new subscribe session (if successfully created).
    */
-  oneway notifyStartSubscribeResponse(CommandIdShort id, WifiNanStatus status, uint16_t sessionId);
+  oneway notifyStartSubscribeResponse(CommandIdShort id, WifiNanStatus status, uint8_t sessionId);
 
   /**
    * Callback invoked in response to a stop subscribe request |stopSubscribeRequest|.
@@ -223,7 +223,7 @@
    *                Possible status codes are:
    *                |NanStatusType.SUCCESS|
    */
-  oneway eventPublishTerminated(uint16_t sessionId, WifiNanStatus status);
+  oneway eventPublishTerminated(uint8_t sessionId, WifiNanStatus status);
 
   /**
    * Asynchronous callback indicating that an active subscribe session has terminated.
@@ -233,7 +233,7 @@
    *                 Possible status codes are:
    *                |NanStatusType.SUCCESS|
    */
-  oneway eventSubscribeTerminated(uint16_t sessionId, WifiNanStatus status);
+  oneway eventSubscribeTerminated(uint8_t sessionId, WifiNanStatus status);
 
   /**
    * Asynchronous callback indicating that a match has occurred: i.e. a service has been
@@ -249,7 +249,7 @@
    * @param discoverySessionId: The discovery session ID of the expired match.
    * @param peerId: The peer ID of the expired match.
    */
-  oneway eventMatchExpired(uint16_t discoverySessionId, uint32_t peerId);
+  oneway eventMatchExpired(uint8_t discoverySessionId, uint32_t peerId);
 
   /**
    * Asynchronous callback indicating that a followup message has been received from a peer.
diff --git a/wifi/1.0/default/wifi_nan_iface.cpp b/wifi/1.0/default/wifi_nan_iface.cpp
index 05479e7..8d76f91 100644
--- a/wifi/1.0/default/wifi_nan_iface.cpp
+++ b/wifi/1.0/default/wifi_nan_iface.cpp
@@ -495,7 +495,7 @@
 
 Return<void> WifiNanIface::stopPublishRequest(
     uint16_t cmd_id,
-    uint16_t sessionId,
+    uint8_t sessionId,
     stopPublishRequest_cb hidl_status_cb) {
   return validateAndCall(this,
                          WifiStatusCode::ERROR_WIFI_IFACE_INVALID,
@@ -519,7 +519,7 @@
 
 Return<void> WifiNanIface::stopSubscribeRequest(
     uint16_t cmd_id,
-    uint16_t sessionId,
+    uint8_t sessionId,
     stopSubscribeRequest_cb hidl_status_cb) {
   return validateAndCall(this,
                          WifiStatusCode::ERROR_WIFI_IFACE_INVALID,
@@ -665,7 +665,7 @@
 }
 
 WifiStatus WifiNanIface::stopPublishRequestInternal(
-    uint16_t cmd_id, uint16_t sessionId) {
+    uint16_t cmd_id, uint8_t sessionId) {
   legacy_hal::NanPublishCancelRequest legacy_msg;
   legacy_msg.publish_id = sessionId;
   legacy_hal::wifi_error legacy_status =
@@ -686,7 +686,7 @@
 }
 
 WifiStatus WifiNanIface::stopSubscribeRequestInternal(
-    uint16_t cmd_id, uint16_t sessionId) {
+    uint16_t cmd_id, uint8_t sessionId) {
   legacy_hal::NanSubscribeCancelRequest legacy_msg;
   legacy_msg.subscribe_id = sessionId;
   legacy_hal::wifi_error legacy_status =
diff --git a/wifi/1.0/default/wifi_nan_iface.h b/wifi/1.0/default/wifi_nan_iface.h
index af838c5..d1da60e 100644
--- a/wifi/1.0/default/wifi_nan_iface.h
+++ b/wifi/1.0/default/wifi_nan_iface.h
@@ -60,13 +60,13 @@
                                    const NanPublishRequest& msg,
                                    startPublishRequest_cb hidl_status_cb) override;
   Return<void> stopPublishRequest(uint16_t cmd_id,
-                                  uint16_t sessionId,
+                                  uint8_t sessionId,
                                   stopPublishRequest_cb hidl_status_cb) override;
   Return<void> startSubscribeRequest(uint16_t cmd_id,
                                      const NanSubscribeRequest& msg,
                                     startSubscribeRequest_cb hidl_status_cb) override;
   Return<void> stopSubscribeRequest(uint16_t cmd_id,
-                                    uint16_t sessionId,
+                                    uint8_t sessionId,
                                     stopSubscribeRequest_cb hidl_status_cb) override;
   Return<void> transmitFollowupRequest(uint16_t cmd_id,
                                        const NanTransmitFollowupRequest& msg,
@@ -102,10 +102,10 @@
   WifiStatus disableRequestInternal(uint16_t cmd_id);
   WifiStatus startPublishRequestInternal(uint16_t cmd_id,
                                          const NanPublishRequest& msg);
-  WifiStatus stopPublishRequestInternal(uint16_t cmd_id, uint16_t sessionId);
+  WifiStatus stopPublishRequestInternal(uint16_t cmd_id, uint8_t sessionId);
   WifiStatus startSubscribeRequestInternal(uint16_t cmd_id,
                                            const NanSubscribeRequest& msg);
-  WifiStatus stopSubscribeRequestInternal(uint16_t cmd_id, uint16_t sessionId);
+  WifiStatus stopSubscribeRequestInternal(uint16_t cmd_id, uint8_t sessionId);
   WifiStatus transmitFollowupRequestInternal(
       uint16_t cmd_id, const NanTransmitFollowupRequest& msg);
   WifiStatus createDataInterfaceRequestInternal(uint16_t cmd_id,
diff --git a/wifi/1.0/types.hal b/wifi/1.0/types.hal
index ebd9d78..c4bdc23 100644
--- a/wifi/1.0/types.hal
+++ b/wifi/1.0/types.hal
@@ -867,7 +867,7 @@
    * The ID of the discovery session being configured. A value of 0 specifies a request to create
    * a new discovery session.
    */
-  uint16_t sessionId;
+  uint8_t sessionId;
   /**
    * The lifetime of the discovery session in seconds. A value of 0 means run forever or until
    * canceled.
@@ -1042,7 +1042,7 @@
    * ID of an active publish or subscribe discovery session. Follow-up message is transmitted in the
    * context of the discovery session.
    */
-  uint16_t discoverySessionId;
+  uint8_t discoverySessionId;
   /**
    * ID of the peer. Obtained as part of an earlier |eventMatch| or |eventFollowupReceived|.
    */
@@ -1228,7 +1228,7 @@
   /**
    * Publish or subscribe discovery session ID of an existing discovery session.
    */
-  uint16_t discoverySessionId;
+  uint8_t discoverySessionId;
   /**
    * A unique ID of the peer. Can be subsequently used in |transmitFollowupRequest|.
    */
@@ -1313,7 +1313,7 @@
    * Discovery session (publish or subscribe) ID of a previously created discovery session. The
    * message is received in the context of this discovery session.
    */
-  uint16_t discoverySessionId;
+  uint8_t discoverySessionId;
   /**
    * A unique ID of the peer. Can be subsequently used in |transmitFollowupRequest|.
    */
@@ -1378,7 +1378,7 @@
    * ID of an active publish or subscribe discovery session - the data-path request is in the
    * context of this discovery session.
    */
-  uint16_t discoverySessionId;
+  uint8_t discoverySessionId;
   /**
    * MAC address of the Initiator peer. This is the MAC address of the peer's management/discovery
    * NAN interface.
diff --git a/wifi/supplicant/1.0/Android.bp b/wifi/supplicant/1.0/Android.bp
index b985a93..a6c2758 100644
--- a/wifi/supplicant/1.0/Android.bp
+++ b/wifi/supplicant/1.0/Android.bp
@@ -24,19 +24,7 @@
     tools: ["hidl-gen"],
     cmd: "$(location hidl-gen) -o $(genDir) -Lc++ -randroid.hardware:hardware/interfaces -randroid.hidl:system/libhidl/transport android.hardware.wifi.supplicant@1.0",
     srcs: [
-        "types.hal",
-        "ISupplicant.hal",
-        "ISupplicantCallback.hal",
-        "ISupplicantIface.hal",
-        "ISupplicantNetwork.hal",
-        "ISupplicantP2pIface.hal",
-        "ISupplicantP2pIfaceCallback.hal",
-        "ISupplicantP2pNetwork.hal",
-        "ISupplicantP2pNetworkCallback.hal",
-        "ISupplicantStaIface.hal",
-        "ISupplicantStaIfaceCallback.hal",
-        "ISupplicantStaNetwork.hal",
-        "ISupplicantStaNetworkCallback.hal",
+        ":android.hardware.wifi.supplicant@1.0_hal",
     ],
     out: [
         "android/hardware/wifi/supplicant/1.0/types.cpp",
@@ -60,19 +48,7 @@
     tools: ["hidl-gen"],
     cmd: "$(location hidl-gen) -o $(genDir) -Lc++ -randroid.hardware:hardware/interfaces -randroid.hidl:system/libhidl/transport android.hardware.wifi.supplicant@1.0",
     srcs: [
-        "types.hal",
-        "ISupplicant.hal",
-        "ISupplicantCallback.hal",
-        "ISupplicantIface.hal",
-        "ISupplicantNetwork.hal",
-        "ISupplicantP2pIface.hal",
-        "ISupplicantP2pIfaceCallback.hal",
-        "ISupplicantP2pNetwork.hal",
-        "ISupplicantP2pNetworkCallback.hal",
-        "ISupplicantStaIface.hal",
-        "ISupplicantStaIfaceCallback.hal",
-        "ISupplicantStaNetwork.hal",
-        "ISupplicantStaNetworkCallback.hal",
+        ":android.hardware.wifi.supplicant@1.0_hal",
     ],
     out: [
         "android/hardware/wifi/supplicant/1.0/types.h",