Allow DEFAULT_INPUT_METHOD to capture audio during RTT call

The UID of the current InputMethodService (DEFAULT_INPUT_METHOD) is
pushed from AudioService to AudioPolicyService via AudioSystem.
Allow capture audio if:
- the UID is the current InputMethodService's UID,
- AND a RTT call is active,
- AND the source is AUDIO_SOURCE_VOICE_RECOGNITION.

Bug: 147037345
Test: use voice input with Gboard 9.1.4 during a simulated RTT call.
Change-Id: Ib32ec25e962833eddd0320742e177e3c1e0e5c05
diff --git a/services/audiopolicy/service/AudioPolicyService.cpp b/services/audiopolicy/service/AudioPolicyService.cpp
index dd46ffb..cbe6eb9 100644
--- a/services/audiopolicy/service/AudioPolicyService.cpp
+++ b/services/audiopolicy/service/AudioPolicyService.cpp
@@ -437,6 +437,8 @@
 //            OR all active clients are using HOTWORD source
 //        AND no call is active
 //            OR client has CAPTURE_AUDIO_OUTPUT privileged permission
+//    OR the client is the current InputMethodService
+//        AND a RTT call is active AND the source is VOICE_RECOGNITION
 //    OR Any client
 //        AND The assistant is not on TOP
 //        AND is on TOP or latest started
@@ -627,6 +629,12 @@
                     && canCaptureIfInCallOrCommunication(current)) {
                 allowCapture = true;
             }
+        } else if (mUidPolicy->isCurrentImeUid(current->uid)) {
+            // For current InputMethodService allow capture if:
+            //     A RTT call is active AND the source is VOICE_RECOGNITION
+            if (rttCallActive && source == AUDIO_SOURCE_VOICE_RECOGNITION) {
+                allowCapture = true;
+            }
         }
         setAppState_l(current->portId,
                       allowCapture ? apmStatFromAmState(mUidPolicy->getUidState(current->uid)) :