[Jetchat, Owl] Update tests for new semantics behavior.

Semantics merging behavior changed in beta04. Work around this
by using the unmerged tree for now.

https: //issuetracker.google.com/issues/184825850
Change-Id: I5c4ee8614ce2ffc581ee58bf344114426b2d4f9d

Author: nickbutcher

Jetchat/app/src/androidTest/java/com/example/compose/jetchat/ConversationTest.kt

@@ -116,7 +116,10 @@ class ConversationTest {
     @Test
     fun jumpToBottom_snapsToBottomAfterUserInteracted() {
         // First swipe
-        composeTestRule.onNodeWithTag(ConversationTestTag).performGesture {
+        composeTestRule.onNodeWithTag(
+            testTag = ConversationTestTag,
+            useUnmergedTree = true // https://issuetracker.google.com/issues/184825850
+        ).performGesture {
             this.swipe(
                 start = this.center,
                 end = Offset(this.center.x, this.center.y + 500),
@@ -160,7 +163,8 @@ class ConversationTest {
     private fun openEmojiSelector() =
         composeTestRule
             .onNodeWithContentDescription(
-                composeTestRule.activity.getString(R.string.emoji_selector_bt_desc)
+                label = composeTestRule.activity.getString(R.string.emoji_selector_bt_desc),
+                useUnmergedTree = true // https://issuetracker.google.com/issues/184825850
             )
             .performClick()
 }

Jetchat/app/src/androidTest/java/com/example/compose/jetchat/UserInputTest.kt

@@ -154,7 +154,10 @@ class UserInputTest {
 
     private fun openEmojiSelector() =
         composeTestRule
-            .onNodeWithContentDescription(activity.getString(R.string.emoji_selector_bt_desc))
+            .onNodeWithContentDescription(
+                label = activity.getString(R.string.emoji_selector_bt_desc),
+                useUnmergedTree = true // https://issuetracker.google.com/issues/184825850
+            )
             .performClick()
 
     private fun assertEmojiSelectorIsDisplayed() =

Owl/app/src/androidTest/java/com/example/owl/ui/NavigationTest.kt

@@ -68,7 +68,10 @@ class NavigationTest {
         startActivity()
         // The first screen should be the onboarding screen.
         // Assert that the FAB label for the onboarding screen exists:
-        composeTestRule.onNodeWithContentDescription(getOnboardingFabLabel()).assertExists()
+        composeTestRule.onNodeWithContentDescription(
+            label = getOnboardingFabLabel(),
+            useUnmergedTree = true // https://issuetracker.google.com/issues/184825850
+        ).assertExists()
     }
 
     @Test
@@ -78,7 +81,10 @@ class NavigationTest {
 
         // Navigate to the next screen by clicking on the FAB
         val fabLabel = getOnboardingFabLabel()
-        composeTestRule.onNodeWithContentDescription(fabLabel).performClick()
+        composeTestRule.onNodeWithContentDescription(
+            label = fabLabel,
+            useUnmergedTree = true // https://issuetracker.google.com/issues/184825850
+        ).performClick()
 
         // The first course should be shown
         composeTestRule.onNodeWithText(