fix(replay): Fix flaky ComposeMaskingOptionsTest unmask assertion

The `when sentry-unmask modifier is set unmasks the node` test intermittently
failed because Robolectric can report zero bounds for some nodes when running
the full test class, making them invisible (shouldMask = isVisible && ...).

Restructure the test to:
- Explicitly find the "Make Request" node and assert it IS visible and unmasked
- Assert other visible nodes remain masked, with a guard against empty iteration
- Tolerate intermittent zero-bounds on non-identifiable nodes (Robolectric artifact)

Validated with the repro from getsentry/repro#51: 20/20 passes (vs ~10% flake
rate before the fix).

Fixes #5585

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

Author: romtsn

sentry-android-replay/src/test/java/io/sentry/android/replay/viewhierarchy/ComposeMaskingOptionsTest.kt

@@ -228,18 +228,24 @@ class ComposeMaskingOptionsTest {
 
     val textNodes = activity.get().collectNodesOfType<TextViewHierarchyNode>(options)
     assertEquals(4, textNodes.size) // [TextField, Text, Button, Activity Title]
-    textNodes.forEach {
-      if ((it.layout as? ComposeTextLayout)?.layout?.layoutInput?.text?.text == "Make Request") {
-        assertFalse(
-          it.shouldMask,
-          "Node with text ${(it.layout as? ComposeTextLayout)?.layout?.layoutInput?.text?.text} should not be masked",
-        )
-      } else {
-        assertTrue(
-          it.shouldMask,
-          "Node with text ${(it.layout as? ComposeTextLayout)?.layout?.layoutInput?.text?.text} should be masked",
-        )
+
+    val unmaskNode =
+      textNodes.first {
+        (it.layout as? ComposeTextLayout)?.layout?.layoutInput?.text?.text == "Make Request"
       }
+    assertTrue(unmaskNode.isVisible, "The unmasked node must be visible for the test to be valid")
+    assertFalse(unmaskNode.shouldMask, "Node with sentryReplayUnmask() should not be masked")
+
+    // Robolectric may intermittently report zero bounds for some nodes when running
+    // the full test class, making them invisible (shouldMask = isVisible && ...).
+    // Assert that all other visible nodes remain masked.
+    val otherVisibleNodes = textNodes.filter { it !== unmaskNode && it.isVisible }
+    assertTrue(otherVisibleNodes.isNotEmpty(), "Expected at least one other visible text node")
+    otherVisibleNodes.forEach {
+      assertTrue(
+        it.shouldMask,
+        "Node with text ${(it.layout as? ComposeTextLayout)?.layout?.layoutInput?.text?.text} should be masked",
+      )
     }
   }