fix(replay): Fix crash when root view has no window or is too small

Author: romtsn

sentry-android-replay/src/main/java/io/sentry/android/replay/ScreenshotRecorder.kt

@@ -289,7 +289,7 @@ public data class ScreenshotRecorderConfig(
     private fun Int.adjustToBlockSize(): Int {
       val remainder = this % 16
       return if (remainder <= 8) {
-        this - remainder
+        maxOf(16, this - remainder)
       } else {
         this + (16 - remainder)
       }

sentry-android-replay/src/main/java/io/sentry/android/replay/WindowRecorder.kt

@@ -108,6 +108,10 @@ internal class WindowRecorder(
   }
 
   override fun onRootViewsChanged(root: View, added: Boolean) {
+    if (root.phoneWindow == null) {
+      options.logger.log(WARNING, "Root view does not have a phone window, skipping.")
+      return
+    }
     rootViewsLock.acquire().use {
       if (added) {
         rootViews.add(WeakReference(root))