fs_mgr: Add f2fs filesystem check

Change-Id: I7d410f89c1adaaf2fc68aa510ab1f3e6a9783657
fastboot: allow sending raw commands

Change-Id: I8f6e92ee2b6df448056efb86a54ed4858e4a1748
ueventd: Handle online events

Based on upstream commit 75b287b771b302c99797d812122b72f83d2f56f9.

Change-Id: If3bae9f1e9299be386fe805ff903eeba2b165ba2