Support extended range fp16 ClientTargets in HWC

Introduce the concept of hdrSdrRatio for ClientTargets, so that:

* 1.0 is treated as SDR luminance
* hdrSdrRatio is provided to scale the content into display luminance
  range during composition. That is, 1.0 maps to SDR max, and
  hdrSdrRatio maps to display max luminance

Bug: 236745178
Test: builds
Change-Id: Id82a102eaca82f85bf3982538786dd2ae6cb8e61
diff --git a/graphics/composer/aidl/vts/VtsHalGraphicsComposer3_TargetTest.cpp b/graphics/composer/aidl/vts/VtsHalGraphicsComposer3_TargetTest.cpp
index c135298..ca1b6d8 100644
--- a/graphics/composer/aidl/vts/VtsHalGraphicsComposer3_TargetTest.cpp
+++ b/graphics/composer/aidl/vts/VtsHalGraphicsComposer3_TargetTest.cpp
@@ -1828,7 +1828,7 @@
 
     auto& writer = getWriter(getPrimaryDisplayId());
     writer.setClientTarget(getPrimaryDisplayId(), /*slot*/ 0, nullptr, /*acquireFence*/ -1,
-                           Dataspace::UNKNOWN, std::vector<Rect>());
+                           Dataspace::UNKNOWN, std::vector<Rect>(), 1.0f);
 
     execute();
 }