example AIDL HAL extension

This CL shows an example of how to use and retrieve a HAL extension.

Bug: 136027762
Test: run HAL and:
- use "dumpsys --pid android.hardware.vibrator.IVibrator/default" to
make sure that the HAL I'm running is the binary being added.
- VtsHalVibratorTargetTest
- test-vintf-vibrator-ext-client

Change-Id: I8614007a727e8e05ba4667c2cd1623ce936a1609
diff --git a/vibrator/aidl/default/Android.bp b/vibrator/aidl/default/Android.bp
index f399887..dc8867f 100644
--- a/vibrator/aidl/default/Android.bp
+++ b/vibrator/aidl/default/Android.bp
@@ -1,3 +1,19 @@
+cc_library_static {
+    name: "libvibratorexampleimpl",
+    vendor: true,
+    shared_libs: [
+        "libbase",
+        "libbinder_ndk",
+        "vintf-vibrator-ndk_platform",
+    ],
+    export_include_dirs: ["include"],
+    srcs: ["Vibrator.cpp"],
+    visibility: [
+         ":__subpackages__",
+         "//hardware/interfaces/tests/extension/vibrator:__subpackages__",
+    ],
+}
+
 cc_binary {
     name: "android.hardware.vibrator-service.example",
     relative_install_path: "hw",
@@ -9,5 +25,8 @@
         "libbinder_ndk",
         "vintf-vibrator-ndk_platform",
     ],
-    srcs: ["main.cpp", "Vibrator.cpp"],
+    static_libs: [
+        "libvibratorexampleimpl",
+    ],
+    srcs: ["main.cpp"],
 }
diff --git a/vibrator/aidl/default/Vibrator.cpp b/vibrator/aidl/default/Vibrator.cpp
index 18be1a6..09cd234 100644
--- a/vibrator/aidl/default/Vibrator.cpp
+++ b/vibrator/aidl/default/Vibrator.cpp
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-#include "Vibrator.h"
+#include "vibrator-impl/Vibrator.h"
 
 #include <android-base/logging.h>
 #include <thread>
diff --git a/vibrator/aidl/default/Vibrator.h b/vibrator/aidl/default/include/vibrator-impl/Vibrator.h
similarity index 100%
rename from vibrator/aidl/default/Vibrator.h
rename to vibrator/aidl/default/include/vibrator-impl/Vibrator.h
diff --git a/vibrator/aidl/default/main.cpp b/vibrator/aidl/default/main.cpp
index d1619ff..ebb0905 100644
--- a/vibrator/aidl/default/main.cpp
+++ b/vibrator/aidl/default/main.cpp
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-#include "Vibrator.h"
+#include "vibrator-impl/Vibrator.h"
 
 #include <android-base/logging.h>
 #include <android/binder_manager.h>