Treat wear sdk as bootclasspath.

This is a similar hack to the existing auto hack.

PiperOrigin-RevId: 846414279
Change-Id: Iff169c7b30646ccc492f2f6a2e2dedcda622cd34

Author: timpeut

src/tools/java/com/google/devtools/build/android/r8/Desugar.java

@@ -447,7 +447,7 @@ private void desugar() throws CompilationFailedException, IOException {
         ImmutableList.builder();
     for (Path path : options.classpath) {
       ClassFileResourceProvider provider = new ArchiveClassFileProvider(path);
-      if (isPlatform(provider)) {
+      if (isPlatform(path, provider)) {
         bootclasspathProvidersBuilder.add(provider);
       } else {
         classpathProvidersBuilder.add(provider);
@@ -489,8 +489,20 @@ private int getShardNumberForString(int numberOfShards, String string) {
     return Math.floorMod(string.hashCode(), numberOfShards);
   }
 
-  private static boolean isPlatform(ClassFileResourceProvider provider) {
-    // See b/153106333.
+  private static boolean isPlatform(Path path, ClassFileResourceProvider provider) {
+    // See b/456670962
+    // If the jar name contains "wear_sdk_stubs" and it only contains classes in the package
+    // com.google.wear, then it is part of the platform.
+    if (path.toString().contains("android_libs/wear_sdk_stubs/")) {
+      for (String descriptor : provider.getClassDescriptors()) {
+        if (!descriptor.startsWith("Lcom/google/wear/")) {
+          return false;
+        }
+      }
+      return true;
+    }
+
+    // See b/153106333
     boolean mightBePlatform = false;
     for (String descriptor : provider.getClassDescriptors()) {
       // If the jar contains classes in the package android.car.content this could be a platform
@@ -502,7 +514,6 @@ private static boolean isPlatform(ClassFileResourceProvider provider) {
         return false;
       }
     }
-    // Found classes in the package android.car.content and not in the package android.car.test.
     return mightBePlatform;
   }