[automerger skipped] Refactor hiddenAPIEncodeDex for use by...

[automerger skipped] Refactor hiddenAPIEncodeDex for use by bootclasspath_fragment am: ed587c36 -s ours am: 422ad9a7 -s ours

am skip reason: Merged-In I0ebe61abc8e16111c6e8a822eb96c57846b98461 with SHA-1 0916595b is already in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/build/soong/+/14696003

Change-Id: Ie5a6cb94d5f3644fe6f1d1e5518f23df6ef505f2