Re-enable proguard for Dialer

Now that we use d8 instead of dx we no longer get the
SimException errors.  Instead we get some warnings:
In out/target/common/obj/APPS/Dialer_intermediates/classes-proguard.jar:com/android/incallui/answer/impl/affordance/SwipeButtonHelper.class:
  Methods with invalid locals information:
  boolean com.android.incallui.answer.impl.affordance.SwipeButtonHelper.onTouchEvent(android.view.MotionEvent)

Re-enabling proguard requires adding some missing transitive
dependencies and disabling warnings for some classes that
are not in Android.

Bug: 37077388
Test: m Dialer
Change-Id: I83e82d6665f02ec22c1d4ca47dc7ccbc564b8c8d