Add correct icon for overflow menu

- Using vector rather than PNG files to control apk size
- Removing the unused old icon
- The pathdata is obtained from https://icons.googleplex.com/#icon=ic_more_vert&search=dot
- Based on the doc here: http://developer.android.com/tools/help/vector-asset-studio.html
  it makes sense to color icons black and add a tint to the vector drawable.

Bug 25968255

Change-Id: I57c01c44685af0d226fa5876b10f4c44254598ae
diff --git a/res-common/drawable-hdpi/ic_menu_overflow_lt.png b/res-common/drawable-hdpi/ic_menu_overflow_lt.png
deleted file mode 100644
index 1ba1295..0000000
--- a/res-common/drawable-hdpi/ic_menu_overflow_lt.png
+++ /dev/null
Binary files differ
diff --git a/res-common/drawable-mdpi/ic_menu_overflow_lt.png b/res-common/drawable-mdpi/ic_menu_overflow_lt.png
deleted file mode 100644
index 8415096..0000000
--- a/res-common/drawable-mdpi/ic_menu_overflow_lt.png
+++ /dev/null
Binary files differ
diff --git a/res-common/drawable-xhdpi/ic_menu_overflow_lt.png b/res-common/drawable-xhdpi/ic_menu_overflow_lt.png
deleted file mode 100644
index f91b718..0000000
--- a/res-common/drawable-xhdpi/ic_menu_overflow_lt.png
+++ /dev/null
Binary files differ
diff --git a/res-common/drawable-xxhdpi/ic_menu_overflow_lt.png b/res-common/drawable-xxhdpi/ic_menu_overflow_lt.png
deleted file mode 100644
index ff1759b..0000000
--- a/res-common/drawable-xxhdpi/ic_menu_overflow_lt.png
+++ /dev/null
Binary files differ
diff --git a/res-common/drawable/ic_more_vert.xml b/res-common/drawable/ic_more_vert.xml
new file mode 100644
index 0000000..749316a
--- /dev/null
+++ b/res-common/drawable/ic_more_vert.xml
@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+        android:width="24dp"
+        android:height="24dp"
+        android:viewportHeight="24.0"
+        android:viewportWidth="24.0">
+    <path
+        android:fillColor="#FF000000"
+        android:pathData="M12 8c1.1 0 2-.9 2-2s-.9-2-2-2-2 .9-2 2 .9 2 2 2zm0 2c-1.1 0-2 .9-2 2s.9 2 2 2 2-.9 2-2-.9-2-2-2zm0 6c-1.1 0-2 .9-2 2s.9 2 2 2 2-.9 2-2-.9-2-2-2z"/>
+</vector>