[Android] Crash when trying to leave non-string breadcrumbs

[cooperka]

Current behavior

leaveBreadcrumb on Android can't process non-string data types.

For example, each of the following lines:

client.leaveBreadcrumb('some type', { foo: 1 });
client.leaveBreadcrumb('some type', { foo: true });
client.leaveBreadcrumb('some type', { foo: {} });

Leads to a crash with the errors:

TypeError: expected dynamic type `string', but had type `int64'
TypeError: expected dynamic type `string', but had type `boolean'
TypeError: expected dynamic type `string', but had type `object'

They work fine on iOS, and strings do work on Android (e.g. { foo: 'bar' }). The crash itself happens in readStringMap trying to execute pair.getString("value").

Repro steps

You can repro successfully with the current example app, using the code above.

Expected behavior

According to allowedMapObjectTypes in lib/Bugsnag.js, int and boolean should be accepted, and Object should be recursively processed.