Switch from HIDL Composition type to AIDL

In preparation for adding a new Composition type which is only in AIDL.
This change is almost completely mechanical, and should have no impact
on behavior.

Bug: 193170859
Test: existing tests

Change-Id: I1f923fcc8d8e6dff388493a76e31d435638b5255
diff --git a/services/surfaceflinger/DisplayHardware/HWComposer.h b/services/surfaceflinger/DisplayHardware/HWComposer.h
index bd79977..aa4abdf 100644
--- a/services/surfaceflinger/DisplayHardware/HWComposer.h
+++ b/services/surfaceflinger/DisplayHardware/HWComposer.h
@@ -43,6 +43,8 @@
 #include "HWC2.h"
 #include "Hal.h"
 
+#include <aidl/android/hardware/graphics/composer3/Composition.h>
+
 namespace android {
 
 namespace hal = hardware::graphics::composer::hal;
@@ -70,7 +72,9 @@
 class HWComposer {
 public:
     struct DeviceRequestedChanges {
-        using ChangedTypes = std::unordered_map<HWC2::Layer*, hal::Composition>;
+        using ChangedTypes =
+                std::unordered_map<HWC2::Layer*,
+                                   aidl::android::hardware::graphics::composer3::Composition>;
         using ClientTargetProperty = hal::ClientTargetProperty;
         using DisplayRequests = hal::DisplayRequest;
         using LayerRequests = std::unordered_map<HWC2::Layer*, hal::LayerRequest>;