Add global action for screen recording. [1/2]

PS4:
Send record screen broadcast instead of using the service
directly.

Change-Id: Ie6d4655b074992075df0060d23c758f2af06387e

Conflicts:
	core/java/android/provider/Settings.java
	core/res/res/values/vendor_symbols.xml
	policy/src/com/android/internal/policy/impl/GlobalActions.java
Net Stats: Re-implement for 4.4

Change-Id: I7c64a81167d0fea1ccd0adc9ed41e38fc07a79b7

Conflicts:
	packages/SystemUI/res/layout/status_bar_center_clock.xml
	packages/SystemUI/res/values/vendor_dimens.xml
	packages/SystemUI/res/values/vendor_styles.xml