TimePickerDialogModule supports only FragmentActivity (#23372)

Summary:
Now RN has only ReactActivity which extends AppCompatActivity, subclass of FragmentActivity, therefore no need to check if activity is FragmentActivity or not. This PR changes TimePickerDialogModule to work only with FragmentActivity.

Also DialogFragment from Android is deprecated in API 28, and recommends to use DialogFragment from Support Library. Excerpt from DialogFragment documentation.

> **This class was deprecated in API level 28.**
> Use the Support Library DialogFragment for consistent behavior across all devices and access to Lifecycle.

[Android] [Changed] - TimePickerDialogModule supports only FragmentActivity
Pull Request resolved: #23372

Differential Revision: D14030748

Pulled By: cpojer

fbshipit-source-id: 9b3778c90eb1c014260327513bc8709264b94431

Author: dulmandakh

ReactAndroid/src/main/java/com/facebook/react/modules/timepicker/SupportTimePickerDialogFragment.java

@@ -8,14 +8,13 @@
 package com.facebook.react.modules.timepicker;
 
 import android.app.Dialog;
-import android.app.DialogFragment;
-import android.app.TimePickerDialog;
 import android.app.TimePickerDialog.OnTimeSetListener;
 import android.content.Context;
 import android.content.DialogInterface;
 import android.content.DialogInterface.OnDismissListener;
 import android.os.Build;
 import android.os.Bundle;
+import android.support.v4.app.DialogFragment;
 import android.text.format.DateFormat;
 
 import java.util.Calendar;

ReactAndroid/src/main/java/com/facebook/react/modules/timepicker/TimePickerDialogFragment.java

@@ -7,13 +7,13 @@
 
 package com.facebook.react.modules.timepicker;
 
-import android.app.Activity;
-import android.app.DialogFragment;
-import android.app.FragmentManager;
 import android.app.TimePickerDialog.OnTimeSetListener;
 import android.content.DialogInterface;
 import android.content.DialogInterface.OnDismissListener;
 import android.os.Bundle;
+import android.support.v4.app.DialogFragment;
+import android.support.v4.app.FragmentActivity;
+import android.support.v4.app.FragmentManager;
 import android.widget.TimePicker;
 
 import com.facebook.react.bridge.NativeModule;
@@ -92,7 +92,7 @@ public void onDismiss(DialogInterface dialog) {
   @ReactMethod
   public void open(@Nullable final ReadableMap options, Promise promise) {
 
-    Activity activity = getCurrentActivity();
+    FragmentActivity activity = (FragmentActivity) getCurrentActivity();
     if (activity == null) {
       promise.reject(
           ERROR_NO_ACTIVITY,
@@ -101,39 +101,20 @@ public void open(@Nullable final ReadableMap options, Promise promise) {
     }
     // We want to support both android.app.Activity and the pre-Honeycomb FragmentActivity
     // (for apps that use it for legacy reasons). This unfortunately leads to some code duplication.
-    if (activity instanceof android.support.v4.app.FragmentActivity) {
-      android.support.v4.app.FragmentManager fragmentManager =
-          ((android.support.v4.app.FragmentActivity) activity).getSupportFragmentManager();
-      android.support.v4.app.DialogFragment oldFragment =
-          (android.support.v4.app.DialogFragment) fragmentManager.findFragmentByTag(FRAGMENT_TAG);
-      if (oldFragment != null) {
-        oldFragment.dismiss();
-      }
-      SupportTimePickerDialogFragment fragment = new SupportTimePickerDialogFragment();
-      if (options != null) {
-        Bundle args = createFragmentArguments(options);
-        fragment.setArguments(args);
-      }
-      TimePickerDialogListener listener = new TimePickerDialogListener(promise);
-      fragment.setOnDismissListener(listener);
-      fragment.setOnTimeSetListener(listener);
-      fragment.show(fragmentManager, FRAGMENT_TAG);
-    } else {
-      FragmentManager fragmentManager = activity.getFragmentManager();
-      DialogFragment oldFragment = (DialogFragment) fragmentManager.findFragmentByTag(FRAGMENT_TAG);
-      if (oldFragment != null) {
-        oldFragment.dismiss();
-      }
-      TimePickerDialogFragment fragment = new TimePickerDialogFragment();
-      if (options != null) {
-        final Bundle args = createFragmentArguments(options);
-        fragment.setArguments(args);
-      }
-      TimePickerDialogListener listener = new TimePickerDialogListener(promise);
-      fragment.setOnDismissListener(listener);
-      fragment.setOnTimeSetListener(listener);
-      fragment.show(fragmentManager, FRAGMENT_TAG);
+    FragmentManager fragmentManager = activity.getSupportFragmentManager();
+    DialogFragment oldFragment = (DialogFragment) fragmentManager.findFragmentByTag(FRAGMENT_TAG);
+    if (oldFragment != null) {
+      oldFragment.dismiss();
+    }
+    TimePickerDialogFragment fragment = new TimePickerDialogFragment();
+    if (options != null) {
+      Bundle args = createFragmentArguments(options);
+      fragment.setArguments(args);
     }
+    TimePickerDialogListener listener = new TimePickerDialogListener(promise);
+    fragment.setOnDismissListener(listener);
+    fragment.setOnTimeSetListener(listener);
+    fragment.show(fragmentManager, FRAGMENT_TAG);
   }
 
   private Bundle createFragmentArguments(ReadableMap options) {