code: boolean deleteAllTriggerOf(String appPackageName) {
  		String where = Contract.COLUMN_APP_IDENTIFIER + " = ?";
  		String[] whereArgs = { appPackageName };
  		int c = getReadableDatabase().delete(Contract.TABLE_NAME, where, whereArgs);
  		return c > 0;
  	}
docs: Delete all the triggers registered with the given application identifier.
  
  @param appPackageName
  @return true if there is at least one row deleted