Add a sub-HAL implementation for testing multi-HAL

Creates a fake sub-HAL using the default implementation for sensors HAL
2.0 with some small modifications to support the multi-HAL interface.

This sub-HAL can be configured to support two different sets of sensors
making it easier to build and load two different sub-HAL implementations
onto device and verify the multihal implementation works.

Bug: 136511617
Test: compile only. Once multihal can load in sub-HALs, then this can be
accurately tested.

Change-Id: I9b136506bdbc8a3b196fd363748bddfcdd564daf
diff --git a/sensors/2.0/multihal/testing/Android.bp b/sensors/2.0/multihal/testing/Android.bp
new file mode 100644
index 0000000..3dedbd6
--- /dev/null
+++ b/sensors/2.0/multihal/testing/Android.bp
@@ -0,0 +1,55 @@
+//
+// Copyright (C) 2019 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+cc_defaults {
+    name: "android.hardware.sensors@2.0-fakesubhal-defaults",
+    vendor: true,
+    srcs: [
+        "Sensor.cpp",
+        "SensorsSubHal.cpp",
+    ],
+    header_libs: [
+        "android.hardware.sensors@2.0-subhal.header",
+    ],
+    shared_libs: [
+        "android.hardware.sensors@1.0",
+        "android.hardware.sensors@2.0",
+        "libcutils",
+        "libfmq",
+        "libhidlbase",
+        "libhidltransport",
+        "liblog",
+        "libpower",
+        "libutils",
+    ],
+}
+
+cc_library {
+    name: "android.hardware.sensors@2.0-fakesubhal-config1",
+    defaults: ["android.hardware.sensors@2.0-fakesubhal-defaults"],
+    cflags: [
+        "-DSUPPORT_CONTINUOUS_SENSORS",
+        "-DSUB_HAL_NAME=\"FakeSubHal-Continuous\"",
+    ],
+}
+
+cc_library {
+    name: "android.hardware.sensors@2.0-fakesubhal-config2",
+    defaults: ["android.hardware.sensors@2.0-fakesubhal-defaults"],
+    cflags: [
+        "-DSUPPORT_ON_CHANGE_SENSORS",
+        "-DSUB_HAL_NAME=\"FakeSubHal-OnChange\"",
+    ],
+}
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