fix(drawer): Update motion to match spec (#2398)

Author: williamernest

packages/mdc-animation/_functions.scss

@@ -27,3 +27,7 @@
 @function mdc-animation-exit-temporary($name, $duration, $delay: 0ms) {
   @return $name $duration $delay $mdc-animation-sharp-curve-timing-function;
 }
+
+@function mdc-animation-standard($name, $duration, $delay: 0ms) {
+  @return $name $duration $delay $mdc-animation-standard-curve-timing-function;
+}

packages/mdc-drawer/slidable/_variables.scss

@@ -14,7 +14,7 @@
 // limitations under the License.
 //
 
-$mdc-slidable-drawer-transition-close-time: .195s;
-$mdc-slidable-drawer-transition-open-time: .225s;
-$mdc-slidable-drawer-transition-close: mdc-animation-exit-temporary(transform, $mdc-slidable-drawer-transition-close-time);
-$mdc-slidable-drawer-transition-open: mdc-animation-enter(transform, $mdc-slidable-drawer-transition-open-time);
+$mdc-slidable-drawer-transition-close-time: 200ms;
+$mdc-slidable-drawer-transition-open-time: 250ms;
+$mdc-slidable-drawer-transition-close: mdc-animation-standard(transform, $mdc-slidable-drawer-transition-close-time);
+$mdc-slidable-drawer-transition-open: mdc-animation-standard(transform, $mdc-slidable-drawer-transition-open-time);