tree 808aba481a33a5bac6da9784f9ea3466c5a59b28
parent ee605b646562fa32cccceb18c610fc8c37df1ed7
author Lais Andrade <lsandrade@google.com> 1611076425 +0000
committer Lais Andrade <lsandrade@google.com> 1611142513 +0000

Cache result from VibratorService.hasVibrator in SystemVibrator

The existing implementation of performHapticFeedback in
PhoneWindowManager uses both hasVibrator and vibrate methods from
Vibrator class. The implementation of VibratorService.hasVibrator is
already constant, returning true if the device has a built in vibrator.

This adds a cache for this value to SystemVibrator, to avoid binder
calls to system_server after the first one.

Bug: 170127981
Test: manual
Change-Id: I68934a41068f4388449321d08a42d8bf890ea91e