Fix logging implicit sign conversions

The warnings were being hidden by the use of -isystem to include
frameworks/native/include.

Bug: 31752268
Test: m -j
Change-Id: I2ce11db524ee9d8f846fdf3ed6fb882d5ef57956
diff --git a/libs/gui/BufferQueueProducer.cpp b/libs/gui/BufferQueueProducer.cpp
index e51144d..13166f6 100644
--- a/libs/gui/BufferQueueProducer.cpp
+++ b/libs/gui/BufferQueueProducer.cpp
@@ -908,7 +908,8 @@
                 static_cast<uint32_t>(mCore->mQueue.size()),
                 mCore->mFrameCounter + 1);
 
-        ATRACE_INT(mCore->mConsumerName.string(), mCore->mQueue.size());
+        ATRACE_INT(mCore->mConsumerName.string(),
+                static_cast<int32_t>(mCore->mQueue.size()));
         mCore->mOccupancyTracker.registerOccupancyChange(mCore->mQueue.size());
 
         // Take a ticket for the callback functions