Update required emulator build to latest version.

This brings us to http://go/ab/5152797

Change-Id: I05bb741ebbf6f67cd4678514d6ad78dc632e68d0
Test: Boot test with acloud.
diff --git a/emulator-info.txt b/emulator-info.txt
index 0d6e6cf..6290505 100644
--- a/emulator-info.txt
+++ b/emulator-info.txt
@@ -1,2 +1,2 @@
 # Emulator (stable) version
-require version-emulator=4898683
+require version-emulator=5152797