Add a fail string for app pair menu tests

This patch adds a clarifying message for testSaveAppPairMenuItemExistsOnSplitPair() and testSaveAppPairMenuItemDoesNotExistOnSingleTask(). The test should not run when the feature is not yet enabled.

Fixes: 297083938
Test: N/A
Change-Id: Idf4c99ed393e2d6e2c2b7b77dc6083a27c4f90d1
diff --git a/quickstep/tests/src/com/android/quickstep/TaplTestsSplitscreen.java b/quickstep/tests/src/com/android/quickstep/TaplTestsSplitscreen.java
index 92b598b..a90c326 100644
--- a/quickstep/tests/src/com/android/quickstep/TaplTestsSplitscreen.java
+++ b/quickstep/tests/src/com/android/quickstep/TaplTestsSplitscreen.java
@@ -108,7 +108,8 @@
 
     @Test
     public void testSaveAppPairMenuItemExistsOnSplitPair() throws Exception {
-        assumeTrue(FeatureFlags.ENABLE_APP_PAIRS.get());
+        assumeTrue("App pairs feature is currently not enabled, no test needed",
+                FeatureFlags.ENABLE_APP_PAIRS.get());
 
         createAndLaunchASplitPair();
 
@@ -122,7 +123,8 @@
 
     @Test
     public void testSaveAppPairMenuItemDoesNotExistOnSingleTask() throws Exception {
-        assumeTrue(FeatureFlags.ENABLE_APP_PAIRS.get());
+        assumeTrue("App pairs feature is currently not enabled, no test needed",
+                FeatureFlags.ENABLE_APP_PAIRS.get());
 
         startAppFast(CALCULATOR_APP_PACKAGE);