Added rounded corner to bitmap Widget Preview

This applies to the widget picker and the initial Widget drop.

Bug: 183615331
Test: Manually using top preinstalled widgets
Change-Id: Ib7ce422dc485396c2aceec6f43e83529d642ecc7
diff --git a/src/com/android/launcher3/FastBitmapDrawable.java b/src/com/android/launcher3/FastBitmapDrawable.java
index b1fe4a2..0027a50 100644
--- a/src/com/android/launcher3/FastBitmapDrawable.java
+++ b/src/com/android/launcher3/FastBitmapDrawable.java
@@ -28,6 +28,7 @@
 import android.graphics.ColorMatrix;
 import android.graphics.ColorMatrixColorFilter;
 import android.graphics.Paint;
+import android.graphics.Path;
 import android.graphics.PixelFormat;
 import android.graphics.Rect;
 import android.graphics.drawable.Drawable;
@@ -61,6 +62,8 @@
     private boolean mIsPressed;
     private boolean mIsDisabled;
     private float mDisabledAlpha = 1f;
+    private float mRoundedCornersRadius = 0f;
+    private final Path mClipPath = new Path();
 
     // Animator and properties for the fast bitmap drawable's scale
     private static final Property<FastBitmapDrawable, Float> SCALE
@@ -102,6 +105,13 @@
 
     @Override
     public final void draw(Canvas canvas) {
+        if (mRoundedCornersRadius > 0) {
+            float radius = mRoundedCornersRadius * mScale;
+            mClipPath.reset();
+            mClipPath.addRoundRect(0, 0, getIntrinsicWidth(), getIntrinsicHeight(),
+                    radius, radius, Path.Direction.CCW);
+            canvas.clipPath(mClipPath);
+        }
         if (mScale != 1f) {
             int count = canvas.save();
             Rect bounds = getBounds();
@@ -164,6 +174,14 @@
         return mScale;
     }
 
+    public void setRoundedCornersRadius(float radius) {
+        mRoundedCornersRadius = radius;
+    }
+
+    public float getRoundedCornersRadius() {
+        return mRoundedCornersRadius;
+    }
+
     @Override
     public int getIntrinsicWidth() {
         return mBitmap.getWidth();