frameworks: Rquests permission for accessing downloaded files

Allowing systemUI to share downloaded files with RecntsPanelView
via granted permission request ACCESS_ALL_DOWNLOADS.

Change-Id: If7a137639ed69c43cf7736756abe0f1b98442010

Conflicts:
	packages/SystemUI/AndroidManifest.xml

Conflicts:
	packages/SystemUI/AndroidManifest.xml

Conflicts:
	packages/SystemUI/AndroidManifest.xml