Revert "Camera: Propagate power mode selection from UI to lower layers."

This reverts commit 5302d2e099de0ae1c3cb4a9cda993fe28b0e8c46, runtime
power-mode changes are causing stability issues in camcorder

	modified:   src/com/android/camera/PhotoModule.java
	modified:   src/com/android/camera/PhotoUI.java
	modified:   src/com/android/camera/ShutterButton.java
	modified:   src/com/android/camera/VideoUI.java
	modified:   src/com/android/camera/WideAnglePanoramaUI.java