fs_mgr_overlayfs: Revert to use /data only if VAB

Partial revert of aosp/2240456 to fix b/251472189

Bug: 251472189
Test: Treehugger
Test: adb-remount-test
Test: g3-app-compat-main
Change-Id: Ifbd608a249fdc599954c34a134ef8497fdf24b46
1 file changed