Fix collapse arrow contentdescription.

                android:layout_width="@dimen/touch_target_min_size"

                android:layout_height="@dimen/touch_target_min_size"

                android:layout_gravity="center_vertical|end"

                android:contentDescription="@string/expand_alarm"

                android:contentDescription="@string/collapse_alarm"

                android:rotation="@integer/chevron_rotate_180"

                android:scaleType="center"

                android:src="@drawable/ic_expand_down" />