Migrate ReactBridge to kotlin (facebook#48904)

Summary:
Pull Request resolved: facebook#48904

Migrate ReactBridge to kotlin

chagelog: [internal] internal

Differential Revision: D68540709

packages/react-native/ReactAndroid/api/ReactAndroid.api

@@ -1128,12 +1128,12 @@ public abstract class com/facebook/react/bridge/ReactApplicationContext : com/fa
 	public fun <init> (Landroid/content/Context;)V
 }
 
-public class com/facebook/react/bridge/ReactBridge {
-	public fun <init> ()V
-	public static fun getLoadEndTime ()J
-	public static fun getLoadStartTime ()J
-	public static fun isInitialized ()Z
-	public static fun staticInit ()V
+public final class com/facebook/react/bridge/ReactBridge {
+	public static final field INSTANCE Lcom/facebook/react/bridge/ReactBridge;
+	public static final fun getLoadEndTime ()J
+	public static final fun getLoadStartTime ()J
+	public static final fun isInitialized ()Z
+	public static final fun staticInit ()V
 }
 
 public abstract class com/facebook/react/bridge/ReactContext : android/content/ContextWrapper {

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/bridge/ReactBridge.kt

@@ -0,0 +1,46 @@
+/*
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+package com.facebook.react.bridge
+
+import android.os.SystemClock
+import com.facebook.soloader.SoLoader
+import com.facebook.systrace.Systrace
+import com.facebook.systrace.Systrace.TRACE_TAG_REACT_JAVA_BRIDGE
+
+public object ReactBridge {
+  @Volatile private var _loadStartTime: Long = 0
+  @Volatile private var _loadEndTime: Long = 0
+  @Volatile private var _didInit: Boolean = false
+
+  @JvmStatic
+  @Synchronized
+  public fun staticInit() {
+    if (_didInit) {
+      return
+    }
+    _loadStartTime = SystemClock.uptimeMillis()
+    Systrace.beginSection(
+        TRACE_TAG_REACT_JAVA_BRIDGE, "ReactBridge.staticInit::load:reactnativejni")
+    ReactMarker.logMarker(ReactMarkerConstants.LOAD_REACT_NATIVE_SO_FILE_START)
+    SoLoader.loadLibrary("reactnativejni")
+    ReactMarker.logMarker(ReactMarkerConstants.LOAD_REACT_NATIVE_SO_FILE_END)
+    Systrace.endSection(TRACE_TAG_REACT_JAVA_BRIDGE)
+    _loadEndTime = SystemClock.uptimeMillis()
+    _didInit = true
+  }
+
+  @JvmStatic
+  public val loadStartTime: Long
+    get() = _loadStartTime
+
+  @JvmStatic
+  public val loadEndTime: Long
+    get() = _loadEndTime
+
+  @JvmStatic public fun isInitialized(): Boolean = _didInit
+}