Revert "Add updatable-media jarjar rules to framework-all"

We no longer need this jarjar rule because we are not re-compiling
exoplayer.

This reverts commit f92d07e5.

Bug: 149906971
Test: m && \
      unzip -l out/soong/.intermediates/frameworks/base/framework-all/\
      android_common/combined/framework-all.jar \
      | grep exo \
      | grep -v internal
      (no exoplayer classes)
Change-Id: Ic4d7847875797be47e02987337bf685bfe1e6605