Android: Removed identify and added some missing functions

[timanrebel]

0.7

• Breaking change: identify is no longer called automatically. If you want to use People Analytics with your own user ids, you have to call identify manually from now on.
• Added support for the following functions:
  • profileTrackCharge(String name, Object properties)
  • profileClearCharges()
  • profileDeleteUser()
  • showSurveyById(id)
  • showNotificationById(id)