PackageManager: Limit the platform-key protection to test-keys builds

This block (change I7390b3bdf5289411f7a335c69635bed9f74bbfb3) is intended
to protect the system from abuse of well-known keys. That's not the case
if the system is signed with dev or release keys.

Change-Id: Ifb66f775dd28c577447634ae177442732a18b592
Active display: allow hiding low priority notifications. [1/2]

Change-Id: I4831d6864b509e62b449c25619c59f5d6760ec47
Floating toggles (1/2)

Launch toggles in a floating window

Change-Id: Idd345c9c1a2e66023c832cf6037a7864d5e52465
Merge "Floating toggles (1/2)" into jb3
Merge "Active display: allow hiding low priority notifications. [1/2]" into jb3
Merge remote-tracking branch 'upstream/jb3' into jb3