dbus: Add more mock methods for MockBus am: bfea67da61 am: fcfd007796
am: fe6fde33a3

* commit 'fe6fde33a3ff27f24129b69eb59a72f33c214e21':
  dbus: Add more mock methods for MockBus

Change-Id: Iea9279acaafabb50f70ade95d4486099c30ded87