Revert "Revert "audioflinger: implement silenced capture for mmap""

This reverts commit 611ebb95e76c230214780b7b583b8a3c5277ac7a.

Bug: 78118584
bug: 72134552
Test: 'adb shell write_sine_callback -m3 -pl -s100 -x' and Plug headphones in and out.
Test: AAudio CTS tests
Change-Id: I7558ad7b9c6c2d352ebce105382fe914c26fd35e
diff --git a/services/audiopolicy/managerdefault/AudioPolicyManager.cpp b/services/audiopolicy/managerdefault/AudioPolicyManager.cpp
index 947529e..0d36266 100644
--- a/services/audiopolicy/managerdefault/AudioPolicyManager.cpp
+++ b/services/audiopolicy/managerdefault/AudioPolicyManager.cpp
@@ -1468,14 +1468,19 @@
         }
         // For MMAP mode, the first call to getInputForAttr() is made on behalf of audioflinger.
         // The second call is for the first active client and sets the UID. Any further call
-        // corresponds to a new client and is only permitted from the same UId.
+        // corresponds to a new client and is only permitted from the same UID.
+        // If the first UID is silenced, allow a new UID connection and replace with new UID
         if (audioSession->openCount() == 1) {
             audioSession->setUid(uid);
         } else if (audioSession->uid() != uid) {
-            ALOGW("getInputForAttr() bad uid %d for session %d uid %d",
-                  uid, session, audioSession->uid());
-            status = INVALID_OPERATION;
-            goto error;
+            if (!audioSession->isSilenced()) {
+                ALOGW("getInputForAttr() bad uid %d for session %d uid %d",
+                      uid, session, audioSession->uid());
+                status = INVALID_OPERATION;
+                goto error;
+            }
+            audioSession->setUid(uid);
+            audioSession->setSilenced(false);
         }
         audioSession->changeOpenCount(1);
         *inputType = API_INPUT_LEGACY;