Emulator: Have the Settings page say "About emulated device"

The Settings page for a real device says "About phone" or
"About tablet". This text is selected at build time, so the
Emulator cannot get the Sytem to choose correctly at launch time.

Our solution is to say "About emulated device" for all types
of virtual devices.

Change-Id: Ia52c20b794f76230f5b73694fb193c18b173c329
diff --git a/target/product/emulator.mk b/target/product/emulator.mk
index acc7a98..146e0a8 100644
--- a/target/product/emulator.mk
+++ b/target/product/emulator.mk
@@ -59,3 +59,5 @@
     device/generic/goldfish/init.ranchu.rc:root/init.ranchu.rc \
     device/generic/goldfish/fstab.ranchu:root/fstab.ranchu \
     device/generic/goldfish/ueventd.ranchu.rc:root/ueventd.ranchu.rc
+
+PRODUCT_CHARACTERISTICS := emulator