Revert "ANDROID: incremental-fs: fix mount_fs issue"

This reverts commit 013b7ed7.

Test: Can now install the same apk twice, and repeated installs are
stable
Bug: 217661925
Bug: 219731048
Signed-off-by: Paul Lawrence <paullawrence@google.com>
Change-Id: I86871c364c17a0d1107b3891a574b72edcf04ea2
(cherry picked from commit d107cd06f26b4d45b1079c7eb857815905198076)
Signed-off-by: Howard Chen <howardsoc@google.com>