Merge changes from topics "is_debuggable", "stk_home_key_handling"

* changes:
  Remove PhoneConstants.SIM_ID_1
  Replace CatLog.d(this) with CatLog.d(LOG_TAG) in SIM Toolkit classes
  Remove usage of hidden APIs Build.IS_DEBUGGABLE & XmlUtils
  Differentiate home screen from others implemented in the same activity
  Simplify the mechanism of the pending activity and dialog