Enable crosswiki notifications and minor UI fixes in displaying notif…

[maskaravivek]

This PR enables crosswiki notifications so that some of the wikidata and wikipedia notifications(currently thank you edits) can be seen in the app.

Moreover, it does quite a few UI fixes:

• removes whitespace from the beginning of a notification
• shows appropriate notification icon, fetching it from the server
• parses HTML string to show unescaped string

Notifications page now looks much better :)

[codecov-io]

Codecov Report

Merging #1540 into master will decrease coverage by 0.01%.
The diff coverage is 0%.

@@            Coverage Diff            @@
##           master   #1540      +/-   ##
=========================================
- Coverage    3.13%   3.11%   -0.02%     
=========================================
  Files         136     140       +4     
  Lines        7397    7437      +40     
  Branches      713     714       +1     
=========================================
  Hits          232     232              
- Misses       7150    7190      +40     
  Partials       15      15

Impacted Files	Coverage Δ
...ain/java/fr/free/nrw/commons/glide/SvgDecoder.java	0% <0%> (ø)
...ee/nrw/commons/notification/NotificationUtils.java	0% <0%> (ø)	⬆️
.../free/nrw/commons/glide/SvgDrawableTranscoder.java	0% <0%> (ø)
...nrw/commons/notification/NotificationRenderer.java	0% <0%> (ø)	⬆️
...free/nrw/commons/glide/SvgSoftwareLayerSetter.java	0% <0%> (ø)
...rw/commons/mwapi/ApacheHttpClientMediaWikiApi.java	5.46% <0%> (-0.02%)	⬇️
...va/fr/free/nrw/commons/notification/SvgModule.java	0% <0%> (ø)
... and 1 more

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[misaochan]

Thanks for submitting this PR @maskaravivek , this enhancement would be very useful indeed! Happy to merge pending successful tests and separation of Gradle changes.

[misaochan]

Do we want to change this in this PR? Might be worth putting Gradle changes in a separate one.

[maskaravivek]

Gradle changes were unfortunately required as the new library Glide was having dependency conflicts with

com.android.support:design:26.0.2

The only way I was able to fix it was by upgrading the build tools version.

Moreover, adding Glide was necessary for handling .svg images(notification icons on commons are hosted in .svg). The other image library, Fresco that the app already uses, can't handle .svg images.

[misaochan]

Ah okay, thanks for the clarification!

[neslihanturan]

Works for me @maskaravivek thanks!