Android: Roll android_tools and fix lint errors

Update lint to version 26.4.0-alpha03+.

This is the first lint update since 2017 September, thus a long list of
TODOs is expected.

TBR for mechanical fixes to existing lint errors that are only exposed
due to update.

TBR=mheikal@chromium.org

Bug: 900912
Change-Id: I3335834ae308a3411ced51bb2c913b76a8f8d8c3
Reviewed-on: https://chromium-review.googlesource.com/c/1327157
Reviewed-by: Peter Wen <wnwen@chromium.org>
Reviewed-by: Mohamed Heikal <mheikal@chromium.org>
Commit-Queue: Peter Wen <wnwen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#606631}
28 files changed