Emit apex_info to target_files META/apex_info.pb

Test: mm -j
Bug: 172911822

Change-Id: I5a70b75dbe1cd546c66beaa8e4e3a63c3987461e
diff --git a/tools/releasetools/Android.bp b/tools/releasetools/Android.bp
index c28c4dc..473d854 100644
--- a/tools/releasetools/Android.bp
+++ b/tools/releasetools/Android.bp
@@ -28,6 +28,8 @@
         "add_img_to_target_files.py",
     ],
     libs: [
+        "ota_metadata_proto",
+        "releasetools_apex_utils",
         "releasetools_build_image",
         "releasetools_build_super_image",
         "releasetools_common",