Telephony service: add ability to always request focus for calls

Add in the ability to overlay a config value to allow for incoming calls
to always request focus no matter the current ring volume.

Change-Id: Ie1fdbf7f0783772e3a0dae9606e3b5c3ea8e1e2b
Signed-off-by: Roman Birg <roman@cyngn.com>
Fix crash of Samsung phones

Using an alternative SMS app like chompSMS leads to a crash as
sendResult is an array without any entries (sendResult[0] is accessed)
The default SMS app does not show this because mCurrntCmd == null

Change-Id: Icfef6d20f9082dd1f64ed29b67031d2575896513
Merge branch 'cm-11.0' of https://github.com/MotoDX-CM11/android_frameworks_opt_telephony into cm-11.0