Implement native TextInput autoFocus on Android (#27924)

Summary:
Follow up to https://github.com/facebook/react-native/issues/27803. To keep consistency between the implementations this also implements autoFocus natively on Android. This will allow removing the JS auto focus logic completely.

## Changelog

[Android] [Fixed] - Implement native TextInput autoFocus on Android
Pull Request resolved: https://github.com/facebook/react-native/pull/27924

Test Plan: Test using the TextInput example in RN tester.

Differential Revision: D19674506

Pulled By: TheSavior

fbshipit-source-id: 9cbb517fc69bccd11f5292a1ccb4acea2e3713e9

ReactAndroid/src/main/java/com/facebook/react/views/textinput/ReactEditText.java

@@ -100,6 +100,8 @@ public class ReactEditText extends AppCompatEditText {
   private @Nullable String mFontFamily = null;
   private int mFontWeight = ReactTypefaceUtils.UNSET;
   private int mFontStyle = ReactTypefaceUtils.UNSET;
+  private boolean mAutoFocus = false;
+  private boolean mDidAttachToWindow = false;
 
   private ReactViewBackgroundManager mReactBackgroundManager;
 
@@ -750,6 +752,14 @@ public class ReactEditText extends AppCompatEditText {
         span.onAttachedToWindow();
       }
     }
+
+    if (mAutoFocus && !mDidAttachToWindow) {
+      mShouldAllowFocus = true;
+      requestFocus();
+      mShouldAllowFocus = false;
+    }
+
+    mDidAttachToWindow = true;
   }
 
   @Override
@@ -813,6 +823,10 @@ public class ReactEditText extends AppCompatEditText {
     }
   }
 
+  public void setAutoFocus(boolean autoFocus) {
+    mAutoFocus = autoFocus;
+  }
+
   protected void applyTextAttributes() {
     // In general, the `getEffective*` functions return `Float.NaN` if the
     // property hasn't been set.

ReactAndroid/src/main/java/com/facebook/react/views/textinput/ReactTextInputManager.java

@@ -795,6 +795,11 @@ public class ReactTextInputManager extends BaseViewManager<ReactEditText, Layout
     view.setShowSoftInputOnFocus(showKeyboardOnFocus);
   }
 
+  @ReactProp(name = "autoFocus", defaultBoolean = false)
+  public void setAutoFocus(ReactEditText view, boolean autoFocus) {
+    view.setAutoFocus(autoFocus);
+  }
+
   @ReactPropGroup(
       names = {
         ViewProps.BORDER_WIDTH,