encore: Add slightly better UMS storage popup

Change-Id: I5d507a84759d4c73e057c7a6da00f9280d2299c8
diff --git a/overlay/encore/frameworks/base/core/res/res/layout/usb_storage_activity.xml b/overlay/encore/frameworks/base/core/res/res/layout/usb_storage_activity.xml
new file mode 100644
index 0000000..298a94b
--- /dev/null
+++ b/overlay/encore/frameworks/base/core/res/res/layout/usb_storage_activity.xml
@@ -0,0 +1,68 @@
+<?xml version="1.0" encoding="utf-8"?>
+<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/main"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:gravity="center"
+    android:padding="28dip"
+    >
+
+    <ImageView android:id="@+id/icon"
+        android:layout_centerHorizontal="true"
+        android:layout_alignParentTop="true"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:src="@drawable/usb_android" />
+
+    <TextView android:id="@+id/banner"
+        android:layout_centerHorizontal="true"
+        android:layout_below="@id/icon"
+        android:layout_marginTop="10dip"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:textSize="24sp"
+        android:gravity="center"
+        android:text="@string/usb_storage_title" />
+
+    <TextView android:id="@+id/message"
+        android:layout_below="@id/banner"
+        android:layout_marginTop="10dip"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:textSize="20sp"
+        android:gravity="center"
+        android:text="@string/usb_storage_message" />
+
+    <RelativeLayout
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_centerHorizontal="true"
+        android:layout_alignParentBottom="true"
+        android:layout_marginBottom="16dip"
+        >
+
+        <Button android:id="@+id/mount_button" 
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:paddingLeft="18dip"
+            android:paddingRight="18dip"
+            android:text="@string/usb_storage_button_mount"
+            />
+        <Button android:id="@+id/unmount_button"
+            android:visibility="gone"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:paddingLeft="18dip"
+            android:paddingRight="18dip"
+            android:text="@string/usb_storage_stop_button_mount"
+            />
+        <ProgressBar android:id="@+id/progress"
+            android:visibility="gone"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:indeterminate="true"
+            style="?android:attr/progressBarStyle"
+            />
+
+    </RelativeLayout>
+</RelativeLayout>