Exclude test_com.android.tethering from R snapshot

Bug: 218685706
Test: BUILD_NUMBER=fixed packages/modules/common/build/mainline_modules_sdks.sh --build-release=R
      # Run before and after making this change and verify that the
      # only difference is to remove test_com.android.tethering.
      atest --no-bazel-mode --host mainline_modules_sdks_test
Change-Id: Ic24ce4afbe9f84b1afd65dca9cee2154dc436646

build/mainline_modules_sdks.py

@@ -422,6 +422,11 @@ class SnapshotBuilder:
                             scope_pattern=r"(public|system|module-lib)",
                             name_pattern=fr"({module_name}(-removed|-stubs)?)"))
 
+                    available_apexes = [f'"{aosp_apex}"']
+                    if aosp_apex != "com.android.tethering":
+                        available_apexes.append(f'"test_{aosp_apex}"')
+                    apex_available = ",\n        ".join(available_apexes)
+
                     bp.write(f"""
 java_sdk_library_import {{
     name: "{module_name}",
@@ -429,8 +434,7 @@ java_sdk_library_import {{
     prefer: true,
     shared_library: {shared_library},
     apex_available: [
-        "{aosp_apex}",
-        "test_{aosp_apex}",
+        {apex_available},
     ],
     public: {{
         jars: ["public/{module_name}-stubs.jar"],