Metrics: Remove handler for --proto-java-bin flag in dumpsys

* All usages of --proto-java-bin flags are removed
* The handler for --proto-java-bin should therefore be removed as well

Bug: 33693818
Test: make, metrics app integration test
Change-Id: I944a09c2161f4a810e8c7266d2c81660e32bfd03
(cherry picked from commit 758b9cb9)