Update prebuilts/runtime/mainline/update.py.

1. Fetch 32-bit arm impl libs from aosp_arm64 build.
2. Fix the code to construct path in `install_impl_lib_entries`. For
   example, if the build target is "aosp_arm64-trunk_staging-userdebug",
   then the path should be "aosp_arm64-target_files-<BUILD>.zip" rather
   than "aosp_arm64-trunk_staging-target_files-<BUILD>.zip".
3. Don't require --aosp-main-throttled-build if not needed.

Bug: 354697086
Test: prebuilts/runtime/mainline/update.py --aosp-main-build 12120897 --skip-apex --skip-module-sdk
Change-Id: Ia774a7c268672c42c7a2b9f153359ea50e6e6d54
1 file changed