adb-remount-test: try to fixup device after reboot (recovery)

If device records a boot failure, the device could enter recovery
mode.  If so, try another reboot to see if the device will heal.

Test: adb-remount-test.sh
Bug: 132070014
Change-Id: I4bee37e11f6344ab1ce176233d7d4e50df132cd7