Add text drawing utility

[wawesomeNOGUI]

Short text drawing example to use mainly for debugging of apps. The text drawing utilizes the golang.org/x/image/font repository helper functions and basic font.

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Patch Set 1:

(1 comment)

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Patch Set 1:

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Patch Set 1:

(1 comment)

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[gopherbot]

This PR (HEAD: a1e683c) has been imported to Gerrit for code review.

Please visit Gerrit at https://go-review.googlesource.com/c/mobile/+/550995.

Important tips:

• Don't comment on this PR. All discussion takes place in Gerrit.
• You need a Gmail or other Google account to log in to Gerrit.
• To change your code in response to feedback:
  • Push a new commit to the branch used by your GitHub PR.
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  • Critical: you must click the blue Reply button near the top to publish your Gerrit responses.
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• The title and description of the GitHub PR are used to construct the final commit message.
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