Support starting gsid lazily

The aosp/914714 made the gsid to start when needed.
The DynamicAndroidService must support this behavior as well.

Bug:126622385
Test: adb shell am start-activity \
-n com.android.dynandroid/com.android.dynandroid.VerificationActivity  \
-a android.content.action.START_INSTALL    \
--es KEY_SYSTEM_URL file:///storage/emulated/0/Download/system.raw.gz  \
--el KEY_SYSTEM_SIZE $(du -b system.raw)  \
--el KEY_USERDATA_SIZE 8589934592

Change-Id: Ifb9d642d183ed3e7181ed643f9415850178ef58d