Doris Ling 2e4ff90f5a Listen to brigtness updates to update brightness summary.
- add content observer for brightness relates changes, and update the
brightness preference summary when changes occur.
- also check for VR mode and auto brightness mode when reading the
current brightness value.

Change-Id: I611ec77174ab45315ccbee2952bdbc2c9a9cd954
Fix: 37227609
Test: make RunSettingsRoboTests
2017-04-27 10:52:31 -07:00
2015-04-13 09:21:39 -07:00
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3.1 GiB
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Java 89.8%
Kotlin 10.2%