Tiny improve

Change-Id: Id79945dcf342424b4edabafe741a520cac999862
pvt-recovery_test: use SHIP as default

Change-Id: Iadd01381cc0c4670074b443ca4966d7dbed39ffb
Remove --read since it's flushing

Change-Id: Ifc6858305232bc6e89be45216f5b80322784e55c
device-new_bl_test: Make script more smooth and unattended

Change-Id: Ie93e5f8205118cf181392f5212a3dfb4d2148f8c
collect_images: make compatible with factoryrom bootloader

Change-Id: Ic1b256d92176f013bc965f9cee865685c6d73db4