SF: DisplayCommand.colorTransform is just a matrix

Remove the hint from DisplayCommand.colorTransform as currently
we only use ColorTransform::IDENTITY and ColorTransform::ARBITRARY_MATRIX,
which both can be expressed using a matrix.

Bug: 208879711
Test: VTS
Change-Id: I1c335647aabb7f89c2c89e54abfc839d10a659fb
diff --git a/services/surfaceflinger/DisplayHardware/AidlComposerHal.cpp b/services/surfaceflinger/DisplayHardware/AidlComposerHal.cpp
index 6f2880d..a28aeaa 100644
--- a/services/surfaceflinger/DisplayHardware/AidlComposerHal.cpp
+++ b/services/surfaceflinger/DisplayHardware/AidlComposerHal.cpp
@@ -537,9 +537,8 @@
     return Error::NONE;
 }
 
-Error AidlComposer::setColorTransform(Display display, const float* matrix, ColorTransform hint) {
-    mWriter.setColorTransform(translate<int64_t>(display), matrix,
-                              translate<AidlColorTransform>(hint));
+Error AidlComposer::setColorTransform(Display display, const float* matrix) {
+    mWriter.setColorTransform(translate<int64_t>(display), matrix);
     return Error::NONE;
 }