[MaterialCardView] Add (set|get)Progress

This allows to animate the shape of the card.
Using setProgress so that this works with MotionLayout as well.

PiperOrigin-RevId: 257241960

lib/java/com/google/android/material/card/MaterialCardView.java

@@ -31,8 +31,10 @@
 import androidx.annotation.ColorRes;
 import androidx.annotation.Dimension;
 import androidx.annotation.DrawableRes;
+import androidx.annotation.FloatRange;
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
+import com.google.android.material.shape.MaterialShapeDrawable;
 import com.google.android.material.shape.MaterialShapeUtils;
 import com.google.android.material.shape.ShapeAppearanceModel;
 import com.google.android.material.shape.Shapeable;
@@ -239,6 +241,27 @@ float getCardViewRadius() {
     return MaterialCardView.super.getRadius();
   }
 
+
+  /**
+   * Sets the interpolation on the Shape Path of the card. Useful for animations.
+   * @see MaterialShapeDrawable#setInterpolation(float)
+   * @see ShapeAppearanceModel
+   */
+  public void setProgress(@FloatRange(from = 0f, to = 1f) float progress) {
+    cardViewHelper.setProgress(progress);
+  }
+
+
+  /**
+   * Returns the interpolation on the Shape Path of the card.
+   * @see MaterialShapeDrawable#getInterpolation()
+   * @see ShapeAppearanceModel
+   */
+  @FloatRange(from = 0f, to = 1f)
+  public float getProgress() {
+    return cardViewHelper.getProgress();
+  }
+
   @Override
   public void setContentPadding(int left, int top, int right, int bottom) {
     cardViewHelper.setUserContentPadding(left, top, right, bottom);

lib/java/com/google/android/material/card/MaterialCardViewHelper.java

@@ -37,6 +37,7 @@
 import android.os.Build.VERSION_CODES;
 import androidx.annotation.ColorInt;
 import androidx.annotation.Dimension;
+import androidx.annotation.FloatRange;
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 import androidx.annotation.RequiresApi;
@@ -288,6 +289,22 @@ float getCornerRadius() {
     return shapeAppearanceModel.getTopLeftCorner().getCornerSize();
   }
 
+  void setProgress(@FloatRange(from = 0f, to = 1f) float progress) {
+    bgDrawable.setInterpolation(progress);
+    if (foregroundContentDrawable != null) {
+      foregroundContentDrawable.setInterpolation(progress);
+    }
+
+    if (foregroundShapeDrawable != null) {
+      foregroundShapeDrawable.setInterpolation(progress);
+    }
+  }
+
+  @FloatRange(from = 0f, to = 1f)
+  float getProgress() {
+    return bgDrawable.getInterpolation();
+  }
+
   void updateElevation() {
     bgDrawable.setElevation(materialCardView.getCardElevation());
   }