Revert of Actually use --extra-r-text-files in process_resources.py

Revert of Actually use --extra-r-text-files in process_resources.py (patchset #6 id:90001 of https://codereview.chromium.org/1104703003/)

Reason for revert:
Breaks gn apks with no resources.

Original issue's description:
> Actually use --extra-r-text-files in process_resources.py
>
> Generate extra packages' R.java files only containing the resources
> listed in their R.txt files. This significantly reduces the number of
> DEX field IDs taken up by resources.
>
> BUG=480036
> R=cjhopman
>
> Committed: https://crrev.com/a92cf235709397c737d5d9fdbadfb62e497c0334
> Cr-Commit-Position: refs/heads/master@{#328565}

TBR=yfriedman@chromium.org,msw@chromium.org,cullinan@amazon.com
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=480036
Committed: https://crrev.com/61ff577cdede4b1e04846ef4af71659d194219b0
Cr-Commit-Position: refs/heads/master@{#328664}

[cjhopman, 2015-05-07 00:33:35]

Created Revert of Actually use --extra-r-text-files in process_resources.py

[commit-bot: I haz the power, 2015-05-07 00:35:07]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1129103002/1

[commit-bot: I haz the power, 2015-05-07 00:36:41]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-05-07 00:37:41]

Patchset 1 (id:??) landed as
https://crrev.com/61ff577cdede4b1e04846ef4af71659d194219b0
Cr-Commit-Position: refs/heads/master@{#328664}