Use new metalava jar-to-diff command

Replaces the use of `--input-jar-file` and `--api-xml` with the newly
added `jar-to-diff` command.

Test: TARGETS=$(for i in api.xml system-api.xml module-lib-api.xml system-server-api.xml test-api.xml; do echo out/target/common/obj/$i; done)
      m $TARGETS
      # Diff $TARGETS with and without this change to make sure that
      # they are identical, which they are.
(cherry picked from https://android-review.googlesource.com/q/commit:56ac6da961eb660c8ea59c5bb9d71a67433702f5)
Merged-In: I6a78febb4b2e4d06a0b3aea29fb4a7f94c9ab9a4
Change-Id: I6a78febb4b2e4d06a0b3aea29fb4a7f94c9ab9a4