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

This reverts three increment-fs commits:
d5faa13b
10412e10
7ad88c93

This is to fix the incrementalinstall test.
Can now install the same apk twice, and repeated installs are stable.

Bug: 217661925
Bug: 219731048
Signed-off-by: Tadeusz Struk <tadeusz.struk@linaro.org>
Change-Id: Ia8488d728218881ed17e4d68cab21b0b152e3ca4