Is there a currently working solution for the Gmail app (I'm testing Android) to respect 100% width on tables, and is the app's "munging" of tables and TDs to auto width still happening? Most of the information I'm digging up seems to be a couple of years old.

I have an email that according to Litmus Builder and the Gmail emulator (https://github.com/bago/android-gmail-emulator) should be working fairly well at mobile widths. Here's the Builder test result, at https://www.dropbox.com/s/gew9szmxe5ms985/gmail_test_result.png, and here's what I'm actually getting when I send to my Gmail account on up-to-date Android phone, at https://www.dropbox.com/s/7fcfp6g1gpc9t23/gmail_screengrab.png.

The mail works fine on mobile in landscape orientation. (There's a couple of images that aren't loading in portrait orientation, but that's a separate problem.)