Updates per review: update message text for clarity and add quite method on host and device

Added scripts and update java files for Verifier type power test.

Change-Id: Ic73586f428bb0a85cbc1d2178cc352763293c957

Conflicts:
	apps/CtsVerifier/Android.mk
	apps/CtsVerifier/AndroidManifest.xml
	apps/CtsVerifier/assets/scripts/execute_power_tests.py
	apps/CtsVerifier/src/com/android/cts/verifier/sensors/BaseSensorSemiAutomatedTestActivity.java
	apps/CtsVerifier/src/com/android/cts/verifier/sensors/BaseSensorTestActivity.java
	apps/CtsVerifier/src/com/android/cts/verifier/sensors/SensorPowerTestActivity.java
	apps/CtsVerifier/src/com/android/cts/verifier/sensors/helpers/PowerTestHostLink.java