common: Disable continuous transaction tracing on userdebug builds

Change-Id: I95657a00e38f1229675682e784b20cca12c119b0
diff --git a/config/common.mk b/config/common.mk
index 6e9f90c..2f3791a 100644
--- a/config/common.mk
+++ b/config/common.mk
@@ -152,6 +152,11 @@
 PRODUCT_SYSTEM_DEFAULT_PROPERTIES += \
     dalvik.vm.systemuicompilerfilter=speed
 
+ifeq ($(TARGET_BUILD_VARIANT),userdebug)
+PRODUCT_SYSTEM_DEFAULT_PROPERTIES += \
+    debug.sf.enable_transaction_tracing=false
+endif
+
 # StitchImage
 PRODUCT_PACKAGES += \
     StitchImage