Update default phone resolution and dpi to 720x1280 with 320dpi

Bug: 124777639
Test: acloud create
Change-Id: I0b3f5baea0fe464d20499cc05625e10e23eb6587
diff --git a/public/data/default.config b/public/data/default.config
index fbce8f7..bf3e1a7 100644
--- a/public/data/default.config
+++ b/public/data/default.config
@@ -49,7 +49,7 @@
 # https://developer.android.com/studio/run/managing-avds
 common_hw_property_map {
   key: "phone"
-  value: "cpu:2,resolution:1080x1920,dpi:240,memory:4g,disk:4g"
+  value: "cpu:2,resolution:720x1280,dpi:320,memory:4g,disk:4g"
 }
 
 common_hw_property_map {