1st pass at using ScrimInsetsFrameLayout to show drawer behind translucent ActionBar
Changed status bar color from 75% alpha to 85% alpha
Rewrote handling of drawer behind status bar, created separate style for drawer activities
Correct v21 styles so status bar color doesn't change when moving from drawer to non-drawer activity
Merge pull request #2046 from wordpress-mobile/feature/drawer-scrim-insets

feature/drawer-scrim-insets
Merge branch 'release/3.5' of https://github.com/wordpress-mobile/WordPress-Android into issue/2055-optimal-drawer-width

Conflicts:
	WordPress/src/main/java/org/wordpress/android/ui/WPDrawerActivity.java
	WordPress/src/main/res/layout/activity_drawer.xml
Resolved conflicts in previous commit