Revert "Fix typo"

This reverts commit fc615f4299dd314e449ced19562c79f0513fbd0d.
Revert "ramdisk: Allow apps to access /dev/pmem and /dev/ion"

This reverts commit 698bc9ca6d865660bfe0d4f42defba85b79e8fc9.
Add prebuilt memtrackHAL.so