Make PRODUCT_BOOT_JARS and PRODUCT_UPDATABLE_BOOT_JARS disjoint.

This is to unify boot jars with system server jars:
PRODUCT_SYSTEM_SERVER_JARS and PRODUCT_UPDATABLE_SYSTEM_SERVER_JARS
do not overlap.

Test: walleye-userdebug boots

Bug: 146363577
Change-Id: If001049a46f8e9d38921dabeedbd61e971ebfe73