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/tests/unittests/CompositionTest.cpp b/services/surfaceflinger/tests/unittests/CompositionTest.cpp
index 89a517f..f1e9b31 100644
--- a/services/surfaceflinger/tests/unittests/CompositionTest.cpp
+++ b/services/surfaceflinger/tests/unittests/CompositionTest.cpp
@@ -324,7 +324,9 @@
     template <typename Case>
     static void setupPreconditionCallExpectations(CompositionTest* test) {
         EXPECT_CALL(*test->mComposer, getDisplayCapabilities(HWC_DISPLAY, _))
-                .WillOnce(DoAll(SetArgPointee<1>(std::vector<Hwc2::DisplayCapability>({})),
+                .WillOnce(DoAll(SetArgPointee<1>(
+                                        std::vector<aidl::android::hardware::graphics::composer3::
+                                                            DisplayCapability>({})),
                                 Return(Error::NONE)));
     }