Fix crash related to escaping html entites

[pablode]

Purpose / Description

The Matcher.appendReplacement() method used when escaping html entities treats backslashes (\) and dollar signs ($) differently than the rest of the replacement string. Due to the input not being properly escaped, certain sequences (f.i. "&bsop;") lead to crashes.

Fixes

This fixes issue #5638.

Approach

We use the Matcher.quoteReplacement() helper method to escape the string.

How Has This Been Tested?

I've tested the fix multiple times using an Android 28 emulator.

Checklist

Please, go through these checks before submitting the PR.

• You have not changed whitespace unnecessarily (it makes diffs hard to read)
• You have a descriptive commit message with a short title (first line, max 50 chars).
• Your code follows the style of the project (e.g. never omit braces in if statements)
• You have commented your code, particularly in hard-to-understand areas
• You have performed a self-review of your own code

[mikehardy]

@pablode champion! I'll look at that and try to get it to release quickly

[mikehardy]

Once someone has one of these characters in their collection, it can't be edited to fix it which breaks reviewing that card or fixing it completely - thus the priority

[mikehardy]

seems like the right fix for the issue and uses an API that is available on all our supported SDK versions, thanks @pablode

@timrae could we get this queued for the next build as well (assuming it passes CI, I'm watching that now)

[mikehardy]

@timrae passed CI, this should be all good to go