Merge "Add bootclasspath_fragments to platform-bootclasspath." into sc-dev am: d6999024 am: d77dac95 am: 9b8630fc

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/14519402

Change-Id: I821659296e04d1b7536988c3db8f81915a8ca16b