sf: Update PowerAdvisor to talk to AIDL Power HAL

Updates the PowerAdvisor to talk to the AIDL Power HAL, and hooks up
the new DISPLAY_UPDATE_IMMINENT Boost present in that HAL.

Test: libsurfaceflinger_unittest
Test: libcompositionengine_test
Test: Manual with ALOGV
Bug: 132390048
Bug: 146453294
Change-Id: I3cb3e8d04303373de24b6dc150ce724aac89407c
diff --git a/services/surfaceflinger/sysprop/api/SurfaceFlingerProperties-current.txt b/services/surfaceflinger/sysprop/api/SurfaceFlingerProperties-current.txt
index c66523a..e62c127 100644
--- a/services/surfaceflinger/sysprop/api/SurfaceFlingerProperties-current.txt
+++ b/services/surfaceflinger/sysprop/api/SurfaceFlingerProperties-current.txt
@@ -36,6 +36,11 @@
     prop_name: "ro.surface_flinger.display_primary_white"
   }
   prop {
+    api_name: "display_update_imminent_timeout_ms"
+    type: Integer
+    prop_name: "ro.surface_flinger.display_update_imminent_timeout_ms"
+  }
+  prop {
     api_name: "enable_protected_contents"
     prop_name: "ro.surface_flinger.protected_contents"
   }