Update Microdroid build.prop for U

The host has moved to U, we need to as well.

Bug: 230009239
Bug: 189164487
Bug: 219519679
Test: atest ComposTestCase#testOdrefreshSpeed
Change-Id: Id1d55abcd0807030d86da53e65a8c043ba344d13
Merged-In: Id1d55abcd0807030d86da53e65a8c043ba344d13
Merged-In: I34f41a34a1e3203c0118faa8057378698e2dd65b
diff --git a/microdroid/build.prop b/microdroid/build.prop
index 2caadbf..0908a4c 100644
--- a/microdroid/build.prop
+++ b/microdroid/build.prop
@@ -4,7 +4,7 @@
 service.adb.listen_addrs=vsock:5555
 
 # TODO(b/189164487): support build related properties
-ro.build.version.codename=Tiramisu
+ro.build.version.codename=UpsideDownCake
 ro.build.version.release=13
 ro.build.version.sdk=33
 ro.build.version.security_patch=2022-06-05