Having consistent import order will reduce chance of merge
conflict between internal and external master
Test: rebuild
Change-Id: I0b1a170967ddcce7f388603fd521f6ed1eeba30b
1. Remove the duplicated PrintServicesLoader in Settings
2. Make a androidx.loader in Settings and internally just delegate all calls to the real PrintServicesLoader
3. Get the result from the real loader
Test: manual
Fixes: 111581651
Change-Id: I2a9b3653f5c68f8383a468cd16ef5f7c3fd4bc3a