Update SurfaceFlinger to use power V4 AIDL

Increment the power version to enable several changes
using new load change hint API.

Bug: b/256105073
Bug: b/256918431
Test: atest libsurfaceflinger_unittest
Change-Id: Ia72808ac2def7d3cec2169d57b7d653200119601
diff --git a/services/surfaceflinger/Android.bp b/services/surfaceflinger/Android.bp
index e76b191..45f3cb8 100644
--- a/services/surfaceflinger/Android.bp
+++ b/services/surfaceflinger/Android.bp
@@ -49,7 +49,7 @@
         "android.hardware.graphics.composer@2.4",
         "android.hardware.power@1.0",
         "android.hardware.power@1.3",
-        "android.hardware.power-V2-cpp",
+        "android.hardware.power-V4-cpp",
         "libbase",
         "libbinder",
         "libbinder_ndk",