Create EXTRA_INSTALL_ZIPS variable

Make needs to know about the "extra" zip files that are extracted
to the staging directories so that it can track all the installed files
correctly.

Also add a utility tool for listing the contents of relevant zips.

Bug: 337869220
Test: m droid and checked the contents of file_list.txt when adding an android_app_set locally
Change-Id: Idc5dd785b03c05f7972c66620d4e6359892b3863

scripts/Android.bp

@@ -296,3 +296,9 @@ python_binary_host {
     main: "buildinfo.py",
     srcs: ["buildinfo.py"],
 }
+
+python_binary_host {
+    name: "extra_install_zips_file_list",
+    main: "extra_install_zips_file_list.py",
+    srcs: ["extra_install_zips_file_list.py"],
+}

scripts/extra_install_zips_file_list.py

@@ -0,0 +1,39 @@
+#!/usr/bin/env python3
+
+import argparse
+import os
+import sys
+import zipfile
+from typing import List
+
+def list_files_in_zip(zipfile_path: str) -> List[str]:
+    with zipfile.ZipFile(zipfile_path, 'r') as zf:
+        return zf.namelist()
+
+def main():
+    parser = argparse.ArgumentParser(
+        description='Lists paths to all files inside an EXTRA_INSTALL_ZIPS zip file relative to a partition staging directory. '
+        'This script is just a helper because its difficult to implement this logic in make code.'
+    )
+    parser.add_argument('staging_dir',
+        help='Path to the partition staging directory')
+    parser.add_argument('extra_install_zips', nargs='*',
+        help='The value of EXTRA_INSTALL_ZIPS from make. It should be a list of extraction_dir:zip_file pairs.')
+    args = parser.parse_args()
+
+    staging_dir = args.staging_dir.removesuffix('/') + '/'
+
+    for zip_pair in args.extra_install_zips:
+        d, z = zip_pair.split(':')
+        d = d.removesuffix('/') + '/'
+
+        if d.startswith(staging_dir):
+            d = os.path.relpath(d, staging_dir)
+            if d == '.':
+                d = ''
+            for f in list_files_in_zip(z):
+                print(os.path.join(d, f))
+
+
+if __name__ == "__main__":
+    main()