wilsonshih de93f49ae4 Support wallpaper on secondary displays.(1/N)
Extends WallpaperConnection:mEngine, mapping an engine to a display.
Handling display change events for add or remove wallpaper on secondary
display.
Only attach wallpaper on accessible display, usually WallpaperService is
third party app and cannot access private display.

Bug: 115486823
Test: atest ActivityManagerMultiDisplayTests
Test: atest WallpaperManagerTest

Change-Id: Idb6063c3cf4c8c5b854676666615e3df4e6d65f4
2018-11-21 14:46:24 +08:00
2018-11-14 11:59:20 -08:00
2018-10-24 09:25:55 -06:00
2018-11-19 11:12:53 -08:00
2018-08-02 14:46:03 +01:00
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