Gradle 5 update

[domdomegg]

Description (required)

Fixes #2824, and #3018

What changes did you make and why?

• Updated Gradle
• Disabled R8 for Fresco compatibility
• Added missing commons-lang3 dependency (explanation)
• Updated gradle play publisher for Gradle 5 compatibility (see Unknown file: app/src/main/play Triple-T/gradle-play-publisher#451)

Tests performed (required)

• Tested app on API 28
• Tested that gradle play publisher looks like it should work (not 100% sure as not really able to replicate the setup - can revert if causes issues again but think it should be fine this time)

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Codecov Report

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The diff coverage is n/a.

@@           Coverage Diff            @@
##             master   #3023   +/-   ##
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  Coverage          ?   4.43%           
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  Files             ?     259           
  Lines             ?   12261           
  Branches          ?    1051           
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  Hits              ?     544           
  Misses            ?   11678           
  Partials          ?      39

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[maskaravivek]

Looks good to me based on this thread:

Triple-T/gradle-play-publisher#451

[maskaravivek]

If the build fails after merging this PR, feel free to revert the change. :)

[domdomegg]

Yay, build passed. Hopefully should get the alpha update on Google Play soon.