Turn CONFIG_AMVR on by default

This tool is provisionally adopted.

Change-Id: I100079771544ae3eb4ba510714612483c5828770
diff --git a/build/cmake/aom_config_defaults.cmake b/build/cmake/aom_config_defaults.cmake
index 37cfa76..ce38f23 100644
--- a/build/cmake/aom_config_defaults.cmake
+++ b/build/cmake/aom_config_defaults.cmake
@@ -87,7 +87,7 @@
 set(CONFIG_SPATIAL_RESAMPLING 1 CACHE NUMBER "Spatial resampling.")
 
 # AV1 experiment flags.
-set(CONFIG_AMVR 0 CACHE NUMBER "AV1 experiment flag.")
+set(CONFIG_AMVR 1 CACHE NUMBER "AV1 experiment flag.")
 set(CONFIG_AOM_QM_EXT 1 CACHE NUMBER "AV1 experiment flag.")
 set(CONFIG_CDF_UPDATE_MODE 0 CACHE NUMBER "AV1 experiment flag.")
 set(CONFIG_CFL 1 CACHE NUMBER "AV1 experiment flag.")