Do not skip the update installation if it's a retry

We used to skip the update installation if the battery doesn't reach the
threshold or the boot reason is in blacklist. Afterwards, we just cleared
the BCB and reboot/shutdown the device. However, this leaves the device
in a brick state if the update is a retry; because a subsequent reboot
won't resume the update after the BCB gets cleared.

This CL skips the battery and bootreason check on retries. An alternative
solution is to conduct the check and shutdown the device without clearing the
BCB on INSTALL_SKIPPED; but users who don't have context may reboot the
device manually anyway.

Bug: 65288661
Test: Trigger the INSTALL_SKIPPED with insufficient battery, and check
the behavior with retry_count.

Change-Id: I0bd8ae9cee0e35aeeec3df469a78cec9ee1b8db8