perf(screenshot): Use RGB_565 for screenshot capture bitmaps

Screen content is always opaque so the alpha channel in ARGB_8888 is wasted.
RGB_565 halves the per-screenshot bitmap memory (~2B/px vs 4B/px).

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: romtsn

sentry-android-core/src/main/java/io/sentry/android/core/ScreenshotEventProcessor.java

@@ -216,7 +216,7 @@ private boolean isMaskingEnabled() {
     try (final MaskRenderer maskRenderer = new MaskRenderer()) {
       // Make bitmap mutable if needed
       if (!screenshot.isMutable()) {
-        mutableBitmap = screenshot.copy(Bitmap.Config.ARGB_8888, true);
+        mutableBitmap = screenshot.copy(Bitmap.Config.RGB_565, true);
         if (mutableBitmap == null) {
           screenshot.recycle();
           return null;

sentry-android-core/src/main/java/io/sentry/android/core/internal/util/ScreenshotUtils.java

@@ -97,9 +97,8 @@ public class ScreenshotUtils {
     }
 
     try {
-      // ARGB_8888 -> This configuration is very flexible and offers the best quality
       final Bitmap bitmap =
-          Bitmap.createBitmap(view.getWidth(), view.getHeight(), Bitmap.Config.ARGB_8888);
+          Bitmap.createBitmap(view.getWidth(), view.getHeight(), Bitmap.Config.RGB_565);
 
       final @NotNull CountDownLatch latch = new CountDownLatch(1);