Re-enable backuptool for SLIM_BUILD's

Change-Id: I2a392417a45094b826b1c2745680ba25f689b2ad
Slimify a few scripts

Change-Id: I924bc6529def277e72d9931134e77e610b92f6ea

Conflicts:
	tools/releasetools/edify_generator.py
Updates to non block-based ota

Remove unneeded mount/unmount system and data

Change-Id: Ide4d9ec927a54257e8baa33039e28b8d6839c33f

Print backup/restore information

Change-Id: I8ebbf85f4d81dd54d997a0469c6e2037b73c5178

Flashing non ota block now takes time, give user information

Change-Id: Ic314eddf93dfe1290009368be451055b8758570e