Clean up package names.

Use license name unless package name is given.

Change the package name for the default android license to Android.

Test: m all
Change-Id: I0049b08fc4955a838e33c8bcfed104dbbf8ec7b1

licenses/Android.bp

@@ -20,6 +20,7 @@ package {
 
 license {
     name: "Android-Apache-2.0",
+    package_name: "Android",
     license_kinds: ["SPDX-license-identifier-Apache-2.0"],
     copyright_notice: "Copyright (C) The Android Open Source Project",
     license_text: ["LICENSE"],