Massage APIs for upcoming doclava change.

These changes are needed to ensure that "checkapi" doesn't claim
that we're changing the API after an upcoming doclava change.

Test: manual inspection of API text files
Bug: 69505783
Change-Id: I8292ba80cc65b7dd78f0e9dba4fcc7ffcedfab9c
diff --git a/telecomm/java/android/telecom/TelecomManager.java b/telecomm/java/android/telecom/TelecomManager.java
index da32e0b..92d458f 100644
--- a/telecomm/java/android/telecom/TelecomManager.java
+++ b/telecomm/java/android/telecom/TelecomManager.java
@@ -1346,7 +1346,7 @@
     /**
      * Returns whether TTY is supported on this device.
      */
-
+    @SystemApi
     @RequiresPermission(anyOf = {
             android.Manifest.permission.READ_PRIVILEGED_PHONE_STATE,
             android.Manifest.permission.READ_PHONE_STATE