Keep track of how often textures/buffers are locked on the CPU

For the upcoming preserve attachment optimisation, which will keep buffers/textures locked on the GPU between executions, we don't want to preserve any which are frequently locked on the CPU as that would result in lots of needless waiting for a resource to be unlocked by the GPU when it occasionally frees all preserve attachments when it could have been done much sooner.  By checking if a resource has ever been locked on the CPU and using that to choose whether we preserve it we can avoid such waiting.

app/src/main/cpp/skyline/gpu/buffer.cpp

@@ -331,6 +331,7 @@ namespace skyline::gpu {
 
     void Buffer::lock() {
         mutex.lock();
+        accumulatedCpuLockCounter++;
     }
 
     bool Buffer::LockWithTag(ContextTag pTag) {
@@ -349,7 +350,11 @@ namespace skyline::gpu {
     }
 
     bool Buffer::try_lock() {
-        return mutex.try_lock();
+        if (mutex.try_lock()) {
+            accumulatedCpuLockCounter++;
+            return true;
+        }
+        return false;
     }
 
     BufferDelegate::BufferDelegate(Buffer *buffer) : buffer{buffer} {}