Fix the crashed problem at the AccountSyncSettings

- Use uid mapping to lowWord request code to avoid checking error of the request code.
- Use the local variable to keep the mapping data.
- Use onSaveInstanceState and onActivityCreated to backup/restore the mapped data.

Fixes: 142573823
Test: make RunSettingsGoogleRoboTests -j ROBOTEST_FILTER=com.android.settings.accounts
Change-Id: Ib034c5c418d4b73df604a8dc7d9994309c717356