Add simple method to dump key/value pairs.

Change-Id: I26ebf7e1a1667298c6deca742c104685c52955f7

Author: jsharkey

core/java/com/android/internal/util/IndentingPrintWriter.java

@@ -46,6 +46,10 @@ public void decreaseIndent() {
         mCurrent = mBuilder.toString();
     }
 
+    public void printPair(String key, Object value) {
+        print(key + "=" + String.valueOf(value) + " ");
+    }
+
     @Override
     public void println() {
         super.println();