Before this CL, connected devices settings will use ContentResolver to get advanced device bitmaps on the UI thread. It will have a little chance to cause ANR. This CL uses background thread to get a bitmap to fix ANR issue. Bug: 173283590 Test: Test: make -j42 RunSettingsRoboTests Change-Id: I987759a775d507003fd4ef54f5376bd24e660b3b