Framework: Fix GSM signal strength

Certain OEM gsm ril libs send back a bogus value for LTE signal
that causes SignalStrength.java to default to LTE and report
incorrect signal values.
Use prop value ro.telephony.ril.v3=signalstrength to get proper
GSM signal reading on certain devices.

Change-Id: Ibb23d7b3a2d21001ccbbc6ebfbdc3c5248f18cfc
Signed-off-by: dhacker29 <davidhackerdvm@gmail.com>
Don't show notification ticker for background users on system bar

Change-Id: I36b13adc1616d146e6232343621c37bab8e5dcb4
Fix layout of navigation keys on system bar

Change-Id: If19982615bead7f0576e10d09f94056d43057d30
Remove unnecessary broadcasts

Change-Id: Ic4316f467afce79f6df440ae319a9bf723e10627