commit d94a9388e81a395f74a91dfa2997c35d7c6df574
author jackqdyulei <jackqdyulei@google.com> Wed Aug 09 09:57:05 2017 -0700
committer jackqdyulei <jackqdyulei@google.com> Thu Aug 24 14:00:36 2017 -0700
tree 67c020db15b358c3d2459e72fd986a9b2ca266a2
parent a2a1c156f541bc99d0cd2cdae1d9c97bba131cb1

Add battery indicator to bluetooth icon

This cl creates BluetoothDeviceLayerDrawable, which contains two
drwable:
1. previous bluetooth device drawable
2. battery drawable showing the battery level

If connected bt device has battery level, we will use this
LayerDrawable both in bluetooth main page and detail page.

Also, battery drawable is reused from BatteryMeterDrawableBase, we
rotate base drawable by 90 degree and update the spec a little bit.

Bug: 63393322
Test: RunSettingsLibRoboTests

Change-Id: I55313940576523dcbeb65a6e20e41289da8a3e0c