code: boolean deleteTrigger(long id, String appPackageName) {
  		String where = Contract.COLUMN_APP_IDENTIFIER + " = ? AND " + Contract._ID + " = ?";
  		String[] whereArgs = { appPackageName, Long.toString(id) };
  		int count = getReadableDatabase().delete(Contract.TABLE_NAME, where, whereArgs);
  		return count > 0;
  
  	}
docs: Delete the trigger with the given id.
  
  @param id
  @param appPackageName
  @return true if there is a deletion