JSON path extractor

[lemnik]

Goal

Allow bulk extraction of JSON data from a parsed JSON collection structure based on the JsonCollectionPath syntax.

Design

Introduced JsonDataExtractor as a sealed class with implementations for the various types of data extraction we want to run within the SDK. Each of the extractors "stringify" their data before sending it to an arbitrary output function.

• LiteralPathExtractor extract all of the data for a given path without processing it
• RelativeAddressExtractor calculate and emit the hex-string for the relative address of an arbitrary stack frame
• RegexExtractor either filter based on a regex, or extract groups from the source content
• FilterExtractor (the most complex) filter elements by requiring some number of conditions be met

Testing

New unit tests were added for each of the extraction types.

[bugsnagbot]

Android notifier sizes

Format	Size impact of Bugsnag (kB)	Size impact of Bugsnag when Minified (kB)
APK	1849.13	1603.0
arm64_v8a	659.71	409.86
armeabi_v7a	602.38	352.52
x86	729.33	483.57
x86_64	704.76	454.9

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