tuna: recovery: protect important partitions

Formatting /factory, /boot, /sbl or /xloader is pointless and dangerous.

Change-Id: I32980c57a71e6f7e7bed761379ce157a035ffaf7
tuna: dexopt /system apps to /cache

Change-Id: Ia1c3b2fe6426c6623d82b787614919a3dde0aa87