Disable kallsyms

Change-Id: Icc0e5e81f16bf317891d296e92e63dff53d44481
Remove ext2&ext3 and make ext4 used for those

Change-Id: I0442c5e6e4ce46ea59c443e994a5f79b354a2f36
Set default governor to interactive

Change-Id: I007000e8531a922424ee9bf401b388271eae0e35