commit 20c2f3d98e08c7e163f45009a939f2b2220b28c8
author kanant <kanant@google.com> Thu Oct 01 11:39:12 2020 -0700
committer kanant <kanant@google.com> Mon Oct 12 17:41:00 2020 -0700
tree a840fe9d95a7f35c4a90326c7b1bda3e92327c27
parent a9b62dfd801adc2f6bbf7a011c8d32ba0e51b74e

Adding KeyEvent re-injection support in CarInputService

Note: for testing purposes, a new custom function (f6) was added in reference implementation service.
This function re-injects the KEYCODE_HOME event and should be used as a guideline / reference implementation only.

Test script:
1. Start emulator.
2. Build test service reference implementation:
   ```
   make SampleCustomInputService -j64
   ```
3. Install service reference implementation:
   ```
   adb install -r $OUT/target/product/emulator_car_x86/system/app/SampleCustomInputService/SampleCustomInputService.apk
   ```
4. Start service
   ```
   adb shell am start-foreground-service com.android.car.custominput.sample/.SampleCustomInputService
   ```
5. Send custom input events

   To start activity maps on main display:
   ```adb shell cmd car_service inject-custom-input -d 0 f1```

   Then go back to home by running:
   ```adb shell cmd car_service inject-cutom-input -d 0 f6```

Bug: 159623196
Test: manual (see script above)
Test: atest CarServiceUnitTest
Test: atest CarServicesTest
Test: atest SampleCustomInputServiceTest (requires SampleCustomInputTestService.apk)

Change-Id: Ie92f7b2a3ff93dee69e4a17f0cbbac8817ae202e