android: fit the display cutout insets instead of resizing the window

With 'Enable fullscreen over notch' off on Android 15+, ask the window
manager to fit the display cutout insets rather than sizing the window
to the safe area by hand. The window manager then lays the window out
in the safe area in the same pass that rotates the display, so an
orientation change no longer shows a frame drawn under the cutout.

pkg/android/phoenix/src/com/retroarch/browser/retroactivity/RetroActivityFuture.java

@@ -1,16 +1,10 @@
 package com.retroarch.browser.retroactivity;
 
-import android.content.res.Configuration;
-import android.graphics.Rect;
 import android.util.Log;
-import android.view.Display;
-import android.view.DisplayCutout;
-import android.view.Gravity;
 import android.view.PointerIcon;
 import android.view.View;
 import android.view.WindowInsets;
 import android.view.WindowManager;
-import android.view.WindowMetrics;
 import android.content.Intent;
 import android.content.Context;
 import android.hardware.input.InputManager;
@@ -154,83 +148,24 @@ public final class RetroActivityFuture extends RetroActivityCamera {
     params.layoutInDisplayCutoutMode = writeOverNotch
         ? WindowManager.LayoutParams.LAYOUT_IN_DISPLAY_CUTOUT_MODE_SHORT_EDGES
         : WindowManager.LayoutParams.LAYOUT_IN_DISPLAY_CUTOUT_MODE_NEVER;
-    getWindow().setAttributes(params);
 
-    /* Android 15 forces non-floating activities targeting API 35 or later
-     * into every display cutout mode. NativeActivity renders directly into
-     * the window surface, so resize the window to the system-provided safe
-     * area when drawing over the cutout is disabled. */
+    /* Android 15 forces fullscreen activities targeting API 35 or later
+     * into every display cutout mode unless the window fits some insets.
+     * Fitting the cutout insets keeps the requested mode and has the
+     * window manager place the window in the safe area itself, in the
+     * same layout pass that rotates the display, so no frame is shown
+     * under the cutout while the orientation changes. */
     if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.VANILLA_ICE_CREAM
-        && getApplicationInfo().targetSdkVersion >= Build.VERSION_CODES.VANILLA_ICE_CREAM)
-      updateDisplayCutoutSafeWindow(!writeOverNotch);
-  }
-
-  @SuppressWarnings("deprecation")
-  private void updateDisplayCutoutSafeWindow(boolean avoidDisplayCutout) {
-    if (!avoidDisplayCutout) {
-      setDisplayCutoutSafeWindow(0, 0, 0, 0);
-      return;
+        && getApplicationInfo().targetSdkVersion >= Build.VERSION_CODES.VANILLA_ICE_CREAM) {
+      params.setFitInsetsTypes(writeOverNotch
+          ? 0 : WindowInsets.Type.displayCutout());
+      params.setFitInsetsSides(writeOverNotch
+          ? 0 : WindowInsets.Side.all());
     }
 
-    Display display = (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R)
-        ? getDisplay()
-        : getWindowManager().getDefaultDisplay();
-
-    DisplayCutout cutout = (display != null) ? display.getCutout() : null;
-
-    if (cutout != null)
-      setDisplayCutoutSafeWindow(
-          cutout.getSafeInsetLeft(),
-          cutout.getSafeInsetTop(),
-          cutout.getSafeInsetRight(),
-          cutout.getSafeInsetBottom());
-    else
-      setDisplayCutoutSafeWindow(0, 0, 0, 0);
-  }
-
-  private void setDisplayCutoutSafeWindow(
-      int left, int top, int right, int bottom) {
-    WindowMetrics metrics = getWindowManager().getCurrentWindowMetrics();
-    Rect bounds = metrics.getBounds();
-    boolean fullDisplay =
-        left == 0 && top == 0 && right == 0 && bottom == 0;
-    int width = fullDisplay
-        ? WindowManager.LayoutParams.MATCH_PARENT
-        : bounds.width() - left - right;
-    int height = fullDisplay
-        ? WindowManager.LayoutParams.MATCH_PARENT
-        : bounds.height() - top - bottom;
-    WindowManager.LayoutParams params = getWindow().getAttributes();
-    int gravity = Gravity.TOP | Gravity.LEFT;
-
-    if (params.width == width
-        && params.height == height
-        && params.x == left
-        && params.y == top
-        && params.gravity == gravity)
-      return;
-
-    params.width = width;
-    params.height = height;
-    params.x = left;
-    params.y = top;
-    params.gravity = gravity;
-    params.layoutInDisplayCutoutMode =
-        WindowManager.LayoutParams.LAYOUT_IN_DISPLAY_CUTOUT_MODE_ALWAYS;
     getWindow().setAttributes(params);
   }
 
-  @Override
-  public void onConfigurationChanged(Configuration newConfig) {
-    super.onConfigurationChanged(newConfig);
-    runOnUiThread(new Runnable() {
-      @Override
-      public void run() {
-        updateDisplayCutoutMode();
-      }
-    });
-  }
-
   @Override
   public void onStop() {
     super.onStop();