ANDROID: Incremental fs: Use simple compression in log buffer

Bug: 154342202
Test: incfs_test passes
Signed-off-by: Paul Lawrence <paullawrence@google.com>
Change-Id: Ibcc641dd92596018c9f10b5bc7bd0db2642a80c7
(cherry picked from commit b6b4a3a404ccd9c62347e27c4fc7883d776c2cbb)
Git-commit: fdd560ec
Git-repo: https://android.googlesource.com/kernel/common/


Signed-off-by: Sayali Lokhande <sayalil@codeaurora.org>