Fix a number of multi-user bugs.

In particular, expanded desktop mode couldn't be enabled for non-primary
users as GlobalActions wrote the setting to the primary user's settings
DB.
Also fix some other cases where we didn't track the settings for
multi-user correctly.

Change-Id: I3bec45cb84903120639c2e85c1d71ec9a491933c

Conflicts:
	policy/src/com/android/internal/policy/impl/GlobalActions.java

Conflicts:
	policy/src/com/android/internal/policy/impl/GlobalActions.java
	policy/src/com/android/internal/policy/impl/PhoneWindowManager.java
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_strings.xml
	core/res/res/values/vendor_symbols.xml
	policy/src/com/android/internal/policy/impl/GlobalActions.java