Pull doc-only methods from JavaStarlarkCommon to JavaCommonApi

PiperOrigin-RevId: 579147810
Change-Id: I13a0face5beeee44470786b3255dc85494e132df

src/main/java/com/google/devtools/build/lib/rules/java/JavaStarlarkCommon.java

@@ -271,24 +271,6 @@ public StarlarkValue getDefaultJavacOpts(Info javaToolchainUnchecked, boolean as
     }
   }
 
-  @Override
-  public ProviderApi getJavaToolchainProvider() {
-    // method exists solely for documentation
-    throw new UnsupportedOperationException();
-  }
-
-  @Override
-  public Provider getJavaRuntimeProvider() {
-    // method exists purely for documentation
-    throw new UnsupportedOperationException();
-  }
-
-  @Override
-  public ProviderApi getBootClassPathInfo() {
-    // method exists solely for documentation
-    throw new UnsupportedOperationException();
-  }
-
   @Override
   public String getTargetKind(Object target, StarlarkThread thread) throws EvalException {
     checkPrivateAccess(thread);

src/main/java/com/google/devtools/build/lib/starlarkbuildapi/java/JavaCommonApi.java

@@ -617,21 +617,30 @@ StarlarkValue getDefaultJavacOpts(Info javaToolchain, boolean asDepset)
           "The key used to retrieve the provider that contains information about the Java "
               + "toolchain being used.",
       structField = true)
-  ProviderApi getJavaToolchainProvider();
+  default ProviderApi getJavaToolchainProvider() {
+    // method exists purely for documentation
+    throw new UnsupportedOperationException();
+  }
 
   @StarlarkMethod(
       name = "JavaRuntimeInfo",
       doc =
           "The key used to retrieve the provider that contains information about the Java "
               + "runtime being used.",
       structField = true)
-  ProviderApi getJavaRuntimeProvider();
+  default ProviderApi getJavaRuntimeProvider() {
+    // method exists purely for documentation
+    throw new UnsupportedOperationException();
+  }
 
   @StarlarkMethod(
       name = "BootClassPathInfo",
       doc = "The provider used to supply bootclasspath information",
       structField = true)
-  ProviderApi getBootClassPathInfo();
+  default ProviderApi getBootClassPathInfo() {
+    // method exists solely for documentation
+    throw new UnsupportedOperationException();
+  }
 
   /** Returns target kind. */
   @StarlarkMethod(