Added command / binder method to temporarily disable VoiceInteraction.

It will be used by Automotive when the display is off.

Test: adb shell cmd voiceinteraction disable true && \
      adb shell cmd voiceinteraction show
Test: atest CtsVoiceInteractionTestCases CtsAssistTestCases
Bug: 154011437

Change-Id: Ia87b0544b242c356c4f9180e250e2df54279803f
3 files changed