Add an extra reboot into bootloader

CdmaDevice flasher always expects device in bootloader after
flashSystem. However when we use `fastboot update`, device is
left booting into system, add an extra reboot into bootloader
to fix the flow. This should be a temp solution though.

Bug: 6091168
Change-Id: I878378929e22e96215f48d29213f89356c3ca0f7
1 file changed