Support SBOM generation of m build unbundled APEXs.

Bug: 266726655
Test: banchan com.android.adbd arm64 userdebug && m dist
Test: build/soong/tests/sbom_test.sh
(cherry picked from https://android-review.googlesource.com/q/commit:7c4f064a2bfd17db3129dae64baab510da64eca8)
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:9b228201502154285197e97a30d646feb312112d)
Merged-In: I7abadbc083ef66b0e8ace28de69a1a219670ec37
Change-Id: I7abadbc083ef66b0e8ace28de69a1a219670ec37