Add dump of hdr event history

Track & dump the HDRLayerInfo callback history to
aid debugging when HDR brightness changes aren't
happening

Bug: 234181960
Test: adb shell dumpsys surfaceflinger --hdrinfo
Change-Id: Ia8376517877d4c7844af6be4d488299554c164f5
diff --git a/services/surfaceflinger/Tracing/LayerTracing.cpp b/services/surfaceflinger/Tracing/LayerTracing.cpp
index ecdeabe..b92d50b 100644
--- a/services/surfaceflinger/Tracing/LayerTracing.cpp
+++ b/services/surfaceflinger/Tracing/LayerTracing.cpp
@@ -27,12 +27,13 @@
 #include <utils/Trace.h>
 
 #include "LayerTracing.h"
-#include "RingBuffer.h"
+#include "TransactionRingBuffer.h"
 
 namespace android {
 
 LayerTracing::LayerTracing()
-      : mBuffer(std::make_unique<RingBuffer<LayersTraceFileProto, LayersTraceProto>>()) {}
+      : mBuffer(std::make_unique<TransactionRingBuffer<LayersTraceFileProto, LayersTraceProto>>()) {
+}
 
 LayerTracing::~LayerTracing() = default;
 
diff --git a/services/surfaceflinger/Tracing/LayerTracing.h b/services/surfaceflinger/Tracing/LayerTracing.h
index 40b0fbe..7c0d23d 100644
--- a/services/surfaceflinger/Tracing/LayerTracing.h
+++ b/services/surfaceflinger/Tracing/LayerTracing.h
@@ -30,7 +30,7 @@
 namespace android {
 
 template <typename FileProto, typename EntryProto>
-class RingBuffer;
+class TransactionRingBuffer;
 
 class SurfaceFlinger;
 
@@ -71,7 +71,7 @@
     uint32_t mFlags = TRACE_INPUT;
     mutable std::mutex mTraceLock;
     bool mEnabled GUARDED_BY(mTraceLock) = false;
-    std::unique_ptr<RingBuffer<LayersTraceFileProto, LayersTraceProto>> mBuffer
+    std::unique_ptr<TransactionRingBuffer<LayersTraceFileProto, LayersTraceProto>> mBuffer
             GUARDED_BY(mTraceLock);
     size_t mBufferSizeInBytes GUARDED_BY(mTraceLock) = 20 * 1024 * 1024;
 };
diff --git a/services/surfaceflinger/Tracing/RingBuffer.h b/services/surfaceflinger/Tracing/TransactionRingBuffer.h
similarity index 99%
rename from services/surfaceflinger/Tracing/RingBuffer.h
rename to services/surfaceflinger/Tracing/TransactionRingBuffer.h
index b41c65b..e6f85ca 100644
--- a/services/surfaceflinger/Tracing/RingBuffer.h
+++ b/services/surfaceflinger/Tracing/TransactionRingBuffer.h
@@ -32,7 +32,7 @@
 class SurfaceFlinger;
 
 template <typename FileProto, typename EntryProto>
-class RingBuffer {
+class TransactionRingBuffer {
 public:
     size_t size() const { return mSizeInBytes; }
     size_t used() const { return mUsedInBytes; }
diff --git a/services/surfaceflinger/Tracing/TransactionTracing.h b/services/surfaceflinger/Tracing/TransactionTracing.h
index a59dc6e..31bca5f 100644
--- a/services/surfaceflinger/Tracing/TransactionTracing.h
+++ b/services/surfaceflinger/Tracing/TransactionTracing.h
@@ -30,8 +30,8 @@
 #include "FrontEnd/LayerCreationArgs.h"
 #include "FrontEnd/Update.h"
 #include "LocklessStack.h"
-#include "RingBuffer.h"
 #include "TransactionProtoParser.h"
+#include "TransactionRingBuffer.h"
 
 using namespace android::surfaceflinger;
 
@@ -81,7 +81,7 @@
     static constexpr auto FILE_PATH = "/data/misc/wmtrace/transactions_trace.winscope";
 
     mutable std::mutex mTraceLock;
-    RingBuffer<proto::TransactionTraceFile, proto::TransactionTraceEntry> mBuffer
+    TransactionRingBuffer<proto::TransactionTraceFile, proto::TransactionTraceEntry> mBuffer
             GUARDED_BY(mTraceLock);
     size_t mBufferSizeInBytes GUARDED_BY(mTraceLock) = CONTINUOUS_TRACING_BUFFER_SIZE;
     std::unordered_map<uint64_t, proto::TransactionState> mQueuedTransactions