Add Buttons settings drawable

Change-Id: I8a684dafc823e580d855ed608130fd14f8684cd9
Update Profiles settings icon

Switch to vector drawables to fix blurry drawables

Change-Id: Id3f5e3ad408c4d17659d941f68853379b07c688f
Update the Privacy category drawable

Replace the current ones with new vector drawables

Change-Id: I27a6778d876672c78469b886e2574baa149aad80
Rename Profiles to System profiles

L includes 'Users & Profiles', rename ours to distinguish features
and prevent confusion.

Change-Id: I5a148dcf5fea1b24448d254105b0bd6904a4ddd8
Merge remote-tracking branch 'upstream/cm-12.0' into cm-12.0