display: enable hbm dimming

Bug: 207694487
test: hbm dimming check
Change-Id: I8ff55e6a405e4ee68943751c1d80da71c2bdab2c

device-cheetah.mk

@@ -60,6 +60,9 @@ PRODUCT_COPY_FILES += \
 # Display LBE
 PRODUCT_DEFAULT_PROPERTY_OVERRIDES += vendor.display.lbe.supported=1
 
+#config of display brightness dimming
+PRODUCT_DEFAULT_PROPERTY_OVERRIDES += vendor.display.brightness.dimming.usage=1
+
 # NFC
 PRODUCT_COPY_FILES += \
 	frameworks/native/data/etc/android.hardware.nfc.xml:$(TARGET_COPY_OUT_VENDOR)/etc/permissions/android.hardware.nfc.xml \