Add API to ExecuTorchRuntime; remove Runtime.java and rename references

Author: keyprocedure

extension/android/executorch_android/src/androidTest/java/org/pytorch/executorch/RuntimeInstrumentationTest.java

@@ -8,23 +8,20 @@
 
 package org.pytorch.executorch;
 
-import static org.junit.Assert.assertTrue;
 import static org.junit.Assert.assertNotNull;
 
 import androidx.test.ext.junit.runners.AndroidJUnit4;
 import org.junit.runner.RunWith;
 import org.junit.Test;
 
-/** Unit tests for {@link Runtime}. */
+/** Unit tests for {@link ExecuTorchRuntime}. */
 @RunWith(AndroidJUnit4.class)
 public class RuntimeInstrumentationTest {
 
     @Test
     public void testRuntimeApi() {
-        assertTrue(Runtime.isInitialized());
-
-        String[] ops = Runtime.getRegisteredOps();
-        String[] backends = Runtime.getRegisteredBackends();
+        String[] ops = ExecuTorchRuntime.getRegisteredOps();
+        String[] backends = ExecuTorchRuntime.getRegisteredBackends();
 
         assertNotNull(ops);
         assertNotNull(backends);

extension/android/executorch_android/src/main/java/org/pytorch/executorch/ExecuTorchRuntime.java

@@ -10,6 +10,7 @@
 
 import com.facebook.soloader.nativeloader.NativeLoader;
 import com.facebook.soloader.nativeloader.SystemDelegate;
+import com.facebook.jni.annotations.DoNotStrip;
 
 /** Class for entire ExecuTorch Runtime related functions. */
 public class ExecuTorchRuntime {
@@ -30,4 +31,12 @@ private ExecuTorchRuntime() {}
   public static ExecuTorchRuntime getRuntime() {
     return sInstance;
   }
+
+  /** Get all registered ops. */
+  @DoNotStrip
+  public static native String[] getRegisteredOps();
+
+  /** Get all registered backends. */
+  @DoNotStrip
+  public static native String[] getRegisteredBackends();
 }

extension/android/executorch_android/src/main/java/org/pytorch/executorch/Runtime.java

@@ -17,7 +17,7 @@ namespace runtime = ::executorch::ET_RUNTIME_NAMESPACE;
 
 class AndroidRuntimeJni : public facebook::jni::JavaClass<AndroidRuntimeJni> {
  public:
-  constexpr static const char* kJavaDescriptor = "Lorg/pytorch/executorch/Runtime;";
+  constexpr static const char* kJavaDescriptor = "Lorg/pytorch/executorch/ExecuTorchRuntime;";
 
   static void registerNatives() {
     javaClassStatic()->registerNatives({