Point out that only one API need pass in tap-to-tone CTSV test

Bug: 233716412
Test: build, install, look at the info panel for the tap-to-tone test
Change-Id: Ied3dc6f8e00713ce8bc0197bf9f5d0218114e536
diff --git a/apps/CtsVerifier/res/values/strings.xml b/apps/CtsVerifier/res/values/strings.xml
index 9314c4d..b3015a7 100644
--- a/apps/CtsVerifier/res/values/strings.xml
+++ b/apps/CtsVerifier/res/values/strings.xml
@@ -5655,6 +5655,7 @@
         test is best conducted in a quiet room with the device laying on a table.
         \n\nTo execute test:
         \n1. Select the Audio API to test (\"Native\" has the lowest latency) and press the \"Start\" button.
+        The test needs to pass for ONLY ONE API.
         \n2. Use your fingernail to tap ONCE on the field below to trigger the test tone. DO NOT leave
         the finger resting on the test field. A strong "tick" sound from the fingernail striking
         the display is necessary to register the start of the test process.