Switch from HIDL DisplayCapability to AIDL

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

Similar to I1f923fcc8d8e6dff388493a76e31d435638b5255 for Composition.

Bug: 193170859
Test: existing tests
Change-Id: I448d5d0ec71f99fb3cbfbe505ded40ab37f6083b
diff --git a/services/surfaceflinger/DisplayHardware/HidlComposerHal.cpp b/services/surfaceflinger/DisplayHardware/HidlComposerHal.cpp
index 96f4496..7946002 100644
--- a/services/surfaceflinger/DisplayHardware/HidlComposerHal.cpp
+++ b/services/surfaceflinger/DisplayHardware/HidlComposerHal.cpp
@@ -35,6 +35,8 @@
 #include <algorithm>
 #include <cinttypes>
 
+using aidl::android::hardware::graphics::composer3::DisplayCapability;
+
 namespace android {
 
 using hardware::hidl_handle;
@@ -1020,6 +1022,15 @@
 
 // Composer HAL 2.4
 
+namespace {
+template <typename T>
+void copyCapabilities(const T& tmpCaps, std::vector<DisplayCapability>* outCapabilities) {
+    outCapabilities->resize(tmpCaps.size());
+    std::transform(tmpCaps.begin(), tmpCaps.end(), outCapabilities->begin(),
+                   [](auto cap) { return static_cast<DisplayCapability>(cap); });
+}
+} // anonymous namespace
+
 Error HidlComposer::getDisplayCapabilities(Display display,
                                            std::vector<DisplayCapability>* outCapabilities) {
     if (!mClient_2_3) {
@@ -1034,7 +1045,7 @@
                                                     if (error != V2_4::Error::NONE) {
                                                         return;
                                                     }
-                                                    *outCapabilities = tmpCaps;
+                                                    copyCapabilities(tmpCaps, outCapabilities);
                                                 });
     } else {
         mClient_2_3
@@ -1044,9 +1055,7 @@
                         return;
                     }
 
-                    outCapabilities->resize(tmpCaps.size());
-                    std::transform(tmpCaps.begin(), tmpCaps.end(), outCapabilities->begin(),
-                                   [](auto cap) { return static_cast<DisplayCapability>(cap); });
+                    copyCapabilities(tmpCaps, outCapabilities);
                 });
     }