Get Sketch compiling.

Add an Android.mk.
Android compiles with Java5, which doesn't let you put @Override on
interface methods.
diff --git a/tests/sketch/Android.mk b/tests/sketch/Android.mk
new file mode 100644
index 0000000..814e370
--- /dev/null
+++ b/tests/sketch/Android.mk
@@ -0,0 +1,8 @@
+LOCAL_PATH:= $(call my-dir)
+include $(CLEAR_VARS)
+
+LOCAL_SRC_FILES := $(call all-subdir-java-files)
+
+LOCAL_PACKAGE_NAME := Sketch
+
+include $(BUILD_PACKAGE)
diff --git a/tests/sketch/src/com/android/gesture/example/GestureEntryDemo.java b/tests/sketch/src/com/android/gesture/example/GestureEntryDemo.java
index 0f8d317..8fee21a 100755
--- a/tests/sketch/src/com/android/gesture/example/GestureEntryDemo.java
+++ b/tests/sketch/src/com/android/gesture/example/GestureEntryDemo.java
@@ -71,7 +71,6 @@
         mResult = (Spinner) findViewById(R.id.spinner);
         mResult.setOnItemSelectedListener(new OnItemSelectedListener() {
 
-            @Override
             public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
                 // TODO Auto-generated method stub
                 // correct the recognition result by adding the new example
@@ -83,7 +82,6 @@
                 }
             }
   
-            @Override
             public void onNothingSelected(AdapterView<?> parent) {
               // TODO Auto-generated method stub
               
@@ -96,17 +94,14 @@
         mView.cacheGesture(false);
         mView.setFadingOut(false);
         mView.addGestureListener(new GestureListener() {
-            @Override
             public void onFinishGesture(GesturePad patch, MotionEvent event) {
                 // TODO Auto-generated method stub
                 recognize(patch.getCurrentGesture());
             }
-            @Override
             public void onGesture(GesturePad patch, MotionEvent event) {
               // TODO Auto-generated method stub
               
             }
-            @Override
             public void onStartGesture(GesturePad patch, MotionEvent event) {
               // TODO Auto-generated method stub
               
diff --git a/tests/sketch/src/com/android/gesture/example/GestureLibViewer.java b/tests/sketch/src/com/android/gesture/example/GestureLibViewer.java
index a9893bc..7ae7fc5 100755
--- a/tests/sketch/src/com/android/gesture/example/GestureLibViewer.java
+++ b/tests/sketch/src/com/android/gesture/example/GestureLibViewer.java
@@ -87,7 +87,6 @@
         }
         
         mResult.setOnItemSelectedListener(new OnItemSelectedListener() {
-            @Override
             public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
                 // TODO Auto-generated method stub
                 mSamples = mRecognizer.getGestures(
@@ -103,7 +102,6 @@
                 mView.invalidate();
             }
   
-            @Override
             public void onNothingSelected(AdapterView<?> parent) {
               // TODO Auto-generated method stub
               
@@ -113,7 +111,6 @@
         
         Button remove = (Button)this.findViewById(R.id.remove);
         remove.setOnClickListener(new OnClickListener() {
-            @Override
             public void onClick(View v) {
                 // TODO Auto-generated method stub
                 if (mSamples.isEmpty())
@@ -154,7 +151,6 @@
         
         Button next = (Button)this.findViewById(R.id.next);
         next.setOnClickListener(new OnClickListener() {
-            @Override
             public void onClick(View v) {
                 // TODO Auto-generated method stub
                 if (mCurrentGestureIndex >= mSamples.size()-1)
@@ -172,7 +168,6 @@
 
         Button previous = (Button)this.findViewById(R.id.previous);
         previous.setOnClickListener(new OnClickListener() {
-            @Override
             public void onClick(View v) {
                 // TODO Auto-generated method stub
                 if (mCurrentGestureIndex >= 1 &&
diff --git a/tests/sketch/src/com/android/gesture/recognizer/NearestNeighbor.java b/tests/sketch/src/com/android/gesture/recognizer/NearestNeighbor.java
index 2035fad..cb8a9d3 100755
--- a/tests/sketch/src/com/android/gesture/recognizer/NearestNeighbor.java
+++ b/tests/sketch/src/com/android/gesture/recognizer/NearestNeighbor.java
@@ -66,7 +66,6 @@
     
         
         Collections.sort(list, new Comparator<Prediction>() {
-            @Override
             public int compare(Prediction object1, Prediction object2) {
                 // TODO Auto-generated method stub
                 double score1 = object1.score;