Enable: Replace use of overlayfs' override_creds with overlay_remounter

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This new solution does not require the use of non-upstreamed
override_creds patches.

Test: system/core/fs_mgr/tests/adb-remount-test.sh
Bug: 388912628
Change-Id: Ie35126cef39cd1d7e5e6c52cbd58fca2445b0563