Implement several missing WebSettings methods in TestWebSettings
Merge pull request #764 from peterjanes/master

Implement several missing WebSettings methods in TestWebSettings
Make ShadowParcel use AOSP code.

Instead of implementing each public method, implement the
native methods and delegate to a helper class. This will make
the overall behavior of ShadowParcel much closer to AOSP.

I still need some help making this change not break
RobolectricWiringTest since it has @Implementation for non
Android interface methods.
Add @HiddenApi to native calls in ShadowParcel to fix wiring test.

Fixes pull request #684
Merge pull request #765 from coreydowning/shadow-parcel

Shadow parcel
Hopefully fix the broken Travis build (that we can't reproduce locally).