Add japicmp to sentry-java for API compatibility checks

[runningcode]

Context

#5653 (https://linear.app/getsentry/issue/JAVA-594/missing-throws-annotation-on-sentryokhttpinterceptorintercept) raised the question of whether japicmp (https://github.com/siom79/japicmp) could help us catch API compatibility issues like the missing @Throws on SentryOkHttpInterceptor.intercept().

For example: we should compare SentryOkHttp to Oktthp and SentryTimber to Timber.

[linear-code]

JAVA-600