Add VSR annotation for readback of extended range layers

Extended range layers must not be mutated or tone-mapped pre-blend.

Bug: 377944262
Change-Id: Ia72d9ffc1a9f333c62f4193786287408b4a9ffa5
Flag: EXEMPT test only
Test: this
diff --git a/graphics/composer/aidl/vts/VtsHalGraphicsComposer3_ReadbackTest.cpp b/graphics/composer/aidl/vts/VtsHalGraphicsComposer3_ReadbackTest.cpp
index 9db8794..0561b30 100644
--- a/graphics/composer/aidl/vts/VtsHalGraphicsComposer3_ReadbackTest.cpp
+++ b/graphics/composer/aidl/vts/VtsHalGraphicsComposer3_ReadbackTest.cpp
@@ -1501,6 +1501,7 @@
     std::shared_ptr<TestBufferLayer> mLayer;
 };
 
+// @VsrTest = 4.4-015
 TEST_P(GraphicsColorManagementCompositionTest, ColorConversion) {
     for (ColorMode mode : mTestColorModes) {
         EXPECT_TRUE(mComposerClient