fix(android): improve home press reliability

Author: amillez

android/src/main/java/com/margelo/nitro/cover/CoverBlurRenderer.kt

@@ -23,13 +23,32 @@ internal object CoverBlurRenderer {
   /// one is open) at 1/4 scale, blur it via `RenderEffect`, and apply
   /// to the target ImageView. Falls back to a flat tinted background
   /// on API < 31. No-op when the source view has no laid-out size.
-  fun render(target: ImageView, activity: Activity, style: CoverBlurStyle, intensity: Float) {
+  ///
+  /// `alsoExclude` is the cover's WindowManager-attached root view —
+  /// distinct from `target.rootView` on the SCVH path, where the
+  /// SCVH-hosted FrameLayout (containing `target`) is NOT in
+  /// `WindowManagerGlobal.mViews`, but the wrapping `SurfaceView`
+  /// is. Without this exclude the blur source resolves to that
+  /// SurfaceView, and software-drawing a SurfaceView produces a
+  /// transparent bitmap (its content lives in a separate hardware
+  /// surface) — leaving the blur cover translucent and the activity
+  /// content visible through it.
+  fun render(
+    target: ImageView,
+    activity: Activity,
+    style: CoverBlurStyle,
+    intensity: Float,
+    alsoExclude: View? = null,
+  ) {
     // Capturing the activity's decor alone would blur only what's
     // behind the modal, leaving the modal's content sharp under our
     // cover. Using the topmost host view fixes that. Falls back to the
     // activity decor when nothing else is in front.
-    val source = CoverWindowAttachment.topmostHostViewFor(activity, exclude = target.rootView)
-      ?: activity.window?.decorView ?: return
+    val source = CoverWindowAttachment.topmostHostViewFor(
+      activity,
+      exclude = target.rootView,
+      exclude2 = alsoExclude,
+    ) ?: activity.window?.decorView ?: return
     // 1/4 scale: cuts the bitmap allocation 16× and the GPU upscale on
     // display is hidden behind the blur.
     val bitmap = captureViewBitmap(source, scale = 0.25f) ?: return

android/src/main/java/com/margelo/nitro/cover/CoverWindowAttachment.kt

@@ -49,14 +49,19 @@ internal object CoverWindowAttachment {
   @Volatile private var cachedMViewsField: Field? = null
   @Volatile private var reflectionInitFailed: Boolean = false
 
-  fun topmostHostViewFor(activity: Activity, exclude: View? = null): View? {
+  fun topmostHostViewFor(
+    activity: Activity,
+    exclude: View? = null,
+    exclude2: View? = null,
+  ): View? {
     val views = readWindowManagerViews() ?: return null
     // Iterate in reverse: in WindowManagerGlobal the last entry is
     // the most recently attached, and on a single-activity stack
     // that maps to the topmost window.
     for (i in views.indices.reversed()) {
       val v = views[i]
       if (v === exclude) continue
+      if (v === exclude2) continue
       if (v.windowToken == null) continue
       // Reject views that have been detached from their ViewRootImpl
       // but are still lingering in mViews (mDyingViews entries — see