Add new rules to layoutopt: UseCompoundDrawables and UselessLayout.

Change-Id: I5dfb2567d923da8442b1df1e703e4ebca6e9523b

tools/layoutopt/libs/uix/src/resources/rules/UseCompoundDrawables.rule

@@ -0,0 +1,15 @@
+// Rule: UseCompoundDrawables
+//
+// Description: Checks whether the current node can be replaced by a TextView
+//              using compound drawables.
+//
+// Conditions:
+// - The node is a LinearLayout
+// - The node has two children, ImageView and TextView
+// - The ImageView does not have a weight
+
+if (xml.is("LinearLayout") && xml['*'].size() == 2 && xml.'TextView'.size() == 1 &&
+        xml.'ImageView'.size() == 1 && !xml.'ImageView'.'@android:layout_weight') {
+    analysis << [node: node, description: "This tag and its children can be replaced by one " +
+            "<TextView/> and a compound drawable for the image"]
+}