Move to Android N-MR1 SDK.

Update build-tools from 24.0.2 to 25.0.2
Update platform-tools from 24.0.1 to 25.0.3
Update SDK sources from 23 to 25

Also, re-deleted all non-supported language resources from
the support library.

BUG=688263

Change-Id: I90abe9a1f2170bde57617f8d9c11281fdb2251b6
Reviewed-on: https://chromium-review.googlesource.com/456856
Reviewed-by: John Budorick <jbudorick@chromium.org>