[Predictive Back] Update predictive back animations to use interpolation curve of (0.1, 0.1, 0, 1)

PiperOrigin-RevId: 625671874

Author: dsn5ft

lib/java/com/google/android/material/motion/MaterialBackAnimationHelper.java

@@ -42,7 +42,9 @@ public abstract class MaterialBackAnimationHelper<V extends View> {
   private static final int HIDE_DURATION_MIN_DEFAULT = 150;
   private static final int CANCEL_DURATION_DEFAULT = 100;
 
-  @NonNull private final TimeInterpolator progressInterpolator;
+  @NonNull
+  private final TimeInterpolator progressInterpolator =
+      PathInterpolatorCompat.create(0.1f, 0.1f, 0, 1);
 
   @NonNull protected final V view;
   protected final int hideDurationMax;
@@ -55,11 +57,6 @@ public MaterialBackAnimationHelper(@NonNull V view) {
     this.view = view;
 
     Context context = view.getContext();
-    progressInterpolator =
-        MotionUtils.resolveThemeInterpolator(
-            context,
-            R.attr.motionEasingStandardDecelerateInterpolator,
-            PathInterpolatorCompat.create(0, 0, 0, 1));
     hideDurationMax =
         MotionUtils.resolveThemeDuration(
             context, R.attr.motionDurationMedium2, HIDE_DURATION_MAX_DEFAULT);