Define a system properties to config support one-handed

Add a System Property flag "ro.support_one_handed_mode" to
config support one-handed on device or not.

Bug: 154290458
Issue: FP3-A13#82
Test: manual
Change-Id: I13bd7d81cd4d2a9e8b81f33a54aea142305a37f1
(cherry picked from commit 31402deee3ace7b6f61d45b19953b269eb7f0d51)
diff --git a/device.mk b/device.mk
index bcdeb4e..d7e6785 100644
--- a/device.mk
+++ b/device.mk
@@ -817,6 +817,11 @@
 	SystemUI \
 
 
+# Set support one-handed mode
+PRODUCT_PRODUCT_PROPERTIES += \
+	ro.support_one_handed_mode=true
+
+
 # Perf
 PRODUCT_COPY_FILES += \
 	$(FP_PATH)/configs/powerhint.xml:$(TARGET_COPY_OUT_VENDOR)/etc/powerhint.xml