DocumentsUI: fix white action context bar in TRDS tablet view

Change-Id: I3c580a2aa4f8abbcfd06ad974518343f6e9190c5
Base: fix some compiler warnings

Change-Id: Ifb609ca1091edd92cfb414dfc8c3c501d3e38a9d
Merge remote-tracking branch 'SlimRoms/kk4.4' into kk4.4