Recovery: TWRP: correct graphics corruption and enable USB OTG

RECOVERY_GRAPHICS_USE_LINELENGTH & TARGET_RECOVERY_PIXEL_FORMAT -
fix pixel format used by newer kernel

TW_FLASH_FROM_STORAGE - flash zip from storage rather than copying
to /tmp first

recovery.fstab - (hopefully) add USB OTG support

Change-Id: I02e832f4b7f0ef8006de423a960a7081c42b8651