Enable FEATURE_ACTIVITIES_ON_SECONDARY_DISPLAYS on phones and tablets

Bug: 36776777
Test: android.server.cts.ActivityManagerDisplayTests
Change-Id: If3fbf32f1f6c3de2f12f4b446f9350ea666a0d97
diff --git a/data/etc/handheld_core_hardware.xml b/data/etc/handheld_core_hardware.xml
index b5287ac..9229f82 100644
--- a/data/etc/handheld_core_hardware.xml
+++ b/data/etc/handheld_core_hardware.xml
@@ -46,6 +46,7 @@
     <feature name="android.software.home_screen" />
     <feature name="android.software.input_methods" />
     <feature name="android.software.picture_in_picture" />
+    <feature name="android.software.activities_on_secondary_displays" />
     <feature name="android.software.print" />
     <feature name="android.software.companion_device_setup" />