Change mounting storage data and obb flag to on by default

Change mounting storage data and obb flag to on by default

Test: unbundled/launcher/nexus_unit_test_multi_device_platform
Test: atest android.appsecurity.cts.ExternalStorageHostTest
Test: atest AdoptableHostTest
Test: pass cts/cts_postsubmit_cf_stable-cloud-tf

Bug: 148049767
Change-Id: Iffa8339b10427bea96aa90030463ed18c96eafce