Appears black screen fix for a while

This issue is side-effect of added google patch on KK MR1.

Fix a couple of issues with mOpeningApps.
https://android.googlesource.com/platform/frameworks/base/+/a8ee262c04749db4f32f73d2b9e7f58989c4638b%5E%21/#F0

[Reproduce path]
Settings -> Location -> Location OFF -> Location ON -> "Location consent Dialog" Popup-> "Agree btn" press
-> Black screen appears for a while

Change-Id: I14efdce87e8d78d38f9aae48568f69937e4fe1fa
Frameworks: Update DocumentsUI for theme chooser combatibility

PS2: credit: djdarkknight96
PS3: this time, use the correct owner info
PS:4 fix typo in styles.xml

Change-Id: I121099de6c09d33ef9f02019996eac1c6f1d3731

Conflicts:
	packages/DocumentsUI/AndroidManifest.xml
	packages/DocumentsUI/res/layout/activity.xml
	packages/DocumentsUI/res/layout/fragment_save.xml
	packages/DocumentsUI/res/layout/item_doc_grid.xml
	packages/DocumentsUI/res/values/colors.xml
	packages/DocumentsUI/res/values/styles.xml