The race condition only affects when the client registers for several (all) location listeners.
And the side efects are benign: only the measurement and navigation message status are incurrectly
being sent to the application, but there are no crashes or any real data from GPS being
misscommunicated.
Also:
- cache the last reported status to filter sending notifications when no changes have occurred
- do some cleanup and refactoring in the code changed
Change-Id: I0692e6b70847dc1ee092d7a05a2c6ba3cd9fa147
b/16727892
b/16815124
The listeners are changed to receive statuses asynchronously, this is required because GPS HAL,
requires time to be notified of the capabilities it supports.
Change-Id: Ie69fdd629d8680341386a2c736bc851632dd2bda
