Fix performance-for-range-copy warnings in frameworks/av.

* Use const reference type for loop index variables to avoid unnecessary copy.

Bug: 30413223
Test: build with WITH_TIDY=1
Change-Id: I79969be18569c5bb1ea29ee18ae89a3f9d55ce9c
diff --git a/services/oboeservice/AAudioClientTracker.cpp b/services/oboeservice/AAudioClientTracker.cpp
index 75392bd..a3d5ea1 100644
--- a/services/oboeservice/AAudioClientTracker.cpp
+++ b/services/oboeservice/AAudioClientTracker.cpp
@@ -172,12 +172,12 @@
 
         {
             std::lock_guard<std::mutex> lock(mLock);
-            for (auto serviceStream : mStreams) {
+            for (const auto& serviceStream : mStreams) {
                 streamsToClose.insert(serviceStream);
             }
         }
 
-        for (auto serviceStream : streamsToClose) {
+        for (const auto& serviceStream : streamsToClose) {
             aaudio_handle_t handle = serviceStream->getHandle();
             ALOGW("AAudioClientTracker::binderDied() close abandoned stream 0x%08X\n", handle);
             aaudioService->closeStream(handle);
@@ -200,7 +200,7 @@
     }
 
     result << "  client: pid = " << mProcessId << " has " << mStreams.size() << " streams\n";
-    for (auto serviceStream : mStreams) {
+    for (const auto& serviceStream : mStreams) {
         result << "     stream: 0x" << std::hex << serviceStream->getHandle() << std::dec << "\n";
     }
 
diff --git a/services/oboeservice/AAudioServiceEndpoint.cpp b/services/oboeservice/AAudioServiceEndpoint.cpp
index 81f1d1b..5a78e11 100644
--- a/services/oboeservice/AAudioServiceEndpoint.cpp
+++ b/services/oboeservice/AAudioServiceEndpoint.cpp
@@ -65,7 +65,7 @@
 
     result << "    Registered Streams:" << "\n";
     result << AAudioServiceStreamShared::dumpHeader() << "\n";
-    for (sp<AAudioServiceStreamShared> sharedStream : mRegisteredStreams) {
+    for (const sp<AAudioServiceStreamShared>& sharedStream : mRegisteredStreams) {
         result << sharedStream->dump() << "\n";
     }
 
@@ -158,7 +158,7 @@
 
 void AAudioServiceEndpoint::disconnectRegisteredStreams() {
     std::lock_guard<std::mutex> lock(mLockStreams);
-    for(auto sharedStream : mRegisteredStreams) {
+    for(const auto& sharedStream : mRegisteredStreams) {
         sharedStream->stop();
         sharedStream->disconnect();
     }
diff --git a/services/oboeservice/AAudioServiceEndpointCapture.cpp b/services/oboeservice/AAudioServiceEndpointCapture.cpp
index 6504cc1..7a56141 100644
--- a/services/oboeservice/AAudioServiceEndpointCapture.cpp
+++ b/services/oboeservice/AAudioServiceEndpointCapture.cpp
@@ -80,7 +80,7 @@
         { // brackets are for lock_guard
 
             std::lock_guard <std::mutex> lock(mLockStreams);
-            for (sp<AAudioServiceStreamShared> clientStream : mRegisteredStreams) {
+            for (const sp<AAudioServiceStreamShared>& clientStream : mRegisteredStreams) {
                 if (clientStream->isRunning()) {
                     FifoBuffer *fifo = clientStream->getDataFifoBuffer();
 
diff --git a/services/oboeservice/AAudioServiceEndpointPlay.cpp b/services/oboeservice/AAudioServiceEndpointPlay.cpp
index 8b1cc9f..a29293b 100644
--- a/services/oboeservice/AAudioServiceEndpointPlay.cpp
+++ b/services/oboeservice/AAudioServiceEndpointPlay.cpp
@@ -77,7 +77,7 @@
             int64_t mmapFramesWritten = getStreamInternal()->getFramesWritten();
 
             std::lock_guard <std::mutex> lock(mLockStreams);
-            for (sp<AAudioServiceStreamShared> clientStream : mRegisteredStreams) {
+            for (const sp<AAudioServiceStreamShared>& clientStream : mRegisteredStreams) {
                 if (clientStream->isRunning()) {
                     FifoBuffer *fifo = clientStream->getDataFifoBuffer();
                     // Determine offset between framePosition in client's stream vs the underlying