zram: add zram size property

Bug: 200899926
Test: check zram swap and backing device
Signed-off-by: Martin Liu <liumartin@google.com>
Change-Id: Ife748938f5e7cfb34c343a3f568c93824f33e8fe
Merged-In: Ife748938f5e7cfb34c343a3f568c93824f33e8fe
diff --git a/device-raven.mk b/device-raven.mk
index 33560bb..68b116b 100644
--- a/device-raven.mk
+++ b/device-raven.mk
@@ -219,3 +219,7 @@
 # Override default distortion output gain according to UX experiments
 PRODUCT_PRODUCT_PROPERTIES += \
     vendor.audio.hapticgenerator.distortion.output.gain=0.5
+
+# Set zram size
+PRODUCT_VENDOR_PROPERTIES += \
+    vendor.zram.size=3g