Make hiding gyroscope sensor support conditional

The gyroscope (rotation sensor) was hidden from the system in commit
aeca514de because it has too low precision and fails CTS Verifier tests.
However, hiding support causes issues with apps that depend on the
gyroscope.

Extend the previous fix by making the hiding of support conditional
through a system property, which allows for manual toggling of support.

Issue: FP2P-481
Change-Id: I4d87f1f80308e59efc65363600755d043b24514c
Depends-On: Ic0e4ac920fbc61325addd3f09e6762954430eb37
1 file changed