API Review update for SQLiteDatabase

SQLiteDatabase openDatabase -- should take File for first parameter
  instead of a String path

SQLiteDatabase.OpenParams.Builder -- make sure the javadocs says what
  the default openFlags is and default idle connection timeout

SQLiteDatabase createInMemory -- throw if it has trouble instead of
  returning null.

Test: cts/SQLiteDatabaseTest
Bug: 64331777
Bug: 64331778
Bug: 64330914

Change-Id: Ibecf4f4a6498795f9a5d12b94b77481e5745b523