Integrate DevSupportManager into activity lifecycle (#47531)

Summary:
Pull Request resolved: #47531

When the activity is paused, or destroyed, we should disable the devsupportmanager. (This performs cleanup).

When the activity is resumed, we should re-enable devsupportmanager. (This performs re-initialization).

Changelog: [Internal]

Reviewed By: sammy-SC

Differential Revision: D65689053

fbshipit-source-id: 99de0906b8cdc84f56b4d334ac0eeecc7b436dd5

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/runtime/ReactHostImpl.java

@@ -316,7 +316,7 @@ public void onHostResume(final @Nullable Activity activity) {
     setCurrentActivity(activity);
     ReactContext currentContext = getCurrentReactContext();
 
-    // TODO(T137233065): Enable DevSupportManager here
+    maybeEnableDevSupport(true);
     mReactLifecycleStateManager.moveToOnHostResume(currentContext, getCurrentActivity());
   }
 
@@ -354,7 +354,7 @@ public void onHostPause(final @Nullable Activity activity) {
               + activityClass);
     }
 
-    // TODO(T137233065): Disable DevSupportManager here
+    maybeEnableDevSupport(false);
     mDefaultHardwareBackBtnHandler = null;
     mReactLifecycleStateManager.moveToOnHostPause(currentContext, currentActivity);
   }
@@ -368,7 +368,7 @@ public void onHostPause() {
 
     ReactContext currentContext = getCurrentReactContext();
 
-    // TODO(T137233065): Disable DevSupportManager here
+    maybeEnableDevSupport(false);
     mDefaultHardwareBackBtnHandler = null;
     mReactLifecycleStateManager.moveToOnHostPause(currentContext, getCurrentActivity());
   }
@@ -380,7 +380,7 @@ public void onHostDestroy() {
     final String method = "onHostDestroy()";
     log(method);
 
-    // TODO(T137233065): Disable DevSupportManager here
+    maybeEnableDevSupport(false);
     moveToHostDestroy(getCurrentReactContext());
   }
 
@@ -392,12 +392,18 @@ public void onHostDestroy(@Nullable Activity activity) {
 
     Activity currentActivity = getCurrentActivity();
 
-    // TODO(T137233065): Disable DevSupportManager here
+    maybeEnableDevSupport(false);
     if (currentActivity == activity) {
       moveToHostDestroy(getCurrentReactContext());
     }
   }
 
+  private void maybeEnableDevSupport(boolean enabled) {
+    if (mUseDevSupport) {
+      mDevSupportManager.setDevSupportEnabled(enabled);
+    }
+  }
+
   /**
    * Returns current ReactContext which could be nullable if ReactInstance hasn't been created.
    *