Keyguard: do not play sounds while phone call is active

Change-Id: I834ad52bf7406b92af0840267960bbd959eb8709
Signed-off-by: Roman Birg <roman@cyngn.com>
Fix broken arc drawing in Camera app.

Commit f311e1983741e71e1632044bc8b2356d8688d29c introduced a recursion
abortion threshold, but missed properly handling negative values. Fixit.

Change-Id: I6776371d1567eba0a84d2e1bf702b46879e30332
Merge pull request #6 from CyanogenMod/cm-11.0

Update to upstream