Native crash handling

[aitorvs]

Task/Issue URL: https://app.asana.com/0/488551667048375/1207205378744694/f

Description

Add native crash handler and basic reporting

Steps to test this PR

Test native crash handing

• apply the patch from this Asana task to this PR
• build and install and launch app
• verify Native crash handler init pixel sent appears in logcat
• verify Native crash handler successfully initialized. apperas in logcat
• verify app crashes and Native crash pixel sent appears in logcat
• In kibana, verify pixels appear when applying this filter pixel:m.app*.native.crash.*
• pixels have the right params, main process name, right appVersion and right customTab true/false value

[aitorvs]

• Register in VPN process as well #4519
• Native crash handling #4517 👈
• develop

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[CDRussell]

Tried testing with the patch; it crashes but i'm not seeing any pixels (not in logcat nor kibana). Will wait until we get a chance to pair to look more into it as I might be doing something wrong in the testing, but heads up in case you know why this might be the case, @aitorvs

[aitorvs]

Tried testing with the patch; it crashes but i'm not seeing any pixels (not in logcat nor kibana). Will wait until we get a chance to pair to look more into it as I might be doing something wrong in the testing, but heads up in case you know why this might be the case, @aitorvs

We can take a look tomorrow. I used the patches and could crash and see the pixels in kibana.
Admittedly the test steps were not very accurate (fixed that) so maybe that was the issue.

Gonna run this on emulator as well to see if there's any difference (been running it in pixel 4XL)

[CDRussell]

this is lazily-init'd but the class is a singleton; won't it pick up whether it was a custom tab first time and cache that value thereafter regardless of whether custom tab state changes?

[CDRussell]

Still unsure about custom tab param (see comment), but otherwise, LGTM