Generate block based OTA for product partitions

Currently only the system and vendor partitions are updated in the
generic block based OTA generation script. Since the product partition
is quite large and consist most of APK files, it would be beneficial to
update it similar to system. Handle the odm and system_ext partitions in
the same way as well.

Bug: 132683080
Test: Run unit tests, generate full and incremental OTA with product partitions.
Change-Id: I13478cf9bd32137c6729b8c9cb102080147093f2