libhwui: Use Vulkan by default

Pixel has been using Vulkan in libhwui for several years now. We
strongly recommended using it in the Android 14 (U) CDD, and we plan to
make it MUST in Android 15 (V). Update the default to match.

Bug: 293371537
Bug: 301558076
Test: CtsUiRenderingTestCases, CtsGraphicsTestCases
Change-Id: I106381fadf6a686127cb6120afbaef53db5c4aa8
diff --git a/libs/hwui/Properties.cpp b/libs/hwui/Properties.cpp
index 06aed63..09d3f05 100644
--- a/libs/hwui/Properties.cpp
+++ b/libs/hwui/Properties.cpp
@@ -35,7 +35,7 @@
 
 #ifndef __ANDROID__ // Layoutlib does not compile HWUIProperties.sysprop as it depends on cutils properties
 std::optional<bool> use_vulkan() {
-    return base::GetBoolProperty("ro.hwui.use_vulkan", false);
+    return base::GetBoolProperty("ro.hwui.use_vulkan", true);
 }
 
 std::optional<std::int32_t> render_ahead() {