Having consistent import order will reduce chance of merge
conflict between internal and external master
Test: rebuild
Change-Id: I0b1a170967ddcce7f388603fd521f6ed1eeba30b
In SettingsDumpService, add the feature to dump the default
broswer. When there is no default broswer, dump nothing.
Bug: 27043208
Test: make -j40 RunSettingsRoboTests
Change-Id: I5ce8180d419f8a0e921da72da28eccb36a523668