Merge "Add boot animation progress system property." am: a1d897b939 am: 2213bccdb3 am: 2c20709fc9

Original change: https://android-review.googlesource.com/c/platform/frameworks/native/+/1530628

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I93bb6f200629d78e9a1f9d09fad8520139b7c624
diff --git a/services/surfaceflinger/StartPropertySetThread.cpp b/services/surfaceflinger/StartPropertySetThread.cpp
index db82772..f42cd53 100644
--- a/services/surfaceflinger/StartPropertySetThread.cpp
+++ b/services/surfaceflinger/StartPropertySetThread.cpp
@@ -31,6 +31,7 @@
     property_set(kTimestampProperty, mTimestampPropertyValue ? "1" : "0");
     // Clear BootAnimation exit flag
     property_set("service.bootanim.exit", "0");
+    property_set("service.bootanim.progress", "0");
     // Start BootAnimation if not started
     property_set("ctl.start", "bootanim");
     // Exit immediately