Launcher3: Fix overviewmode overlay

Currently pressing the menu key will cause the overview settings will appear
under the app draw. This allows the menu to only be created if in the workspace

Change-Id: I6c5b8e142f10d534a45d591573ad57c2dfd12c26
Launcher3 : Make privileged app

Enable LOCAL_PRIVILEGED_MODULE for launcher.
This seems to be required to gain widget privileges by default.

Change-Id: Iae2ce085129b39bcc3591ced5f7938d63cebf722