Improve throttler implementation

[gastonfournier]

Describe the feature request

Currently, throttler exposes a lot of methods and requires the client to follow a protocol for it to work properly. Instead, throttler should just wrap the code you want to execute and handle skips internally.

If anyone feels like contributing this might be a good option

Background

No response

Solution suggestions

        return throttler.execute {
            Log.d(TAG, "Refreshing toggles")
            val response = doFetchToggles(ctx)
            fetcherHeartbeatFlow.emit(HeartbeatEvent(response.status, response.error?.message))
            return@execute response
        }.orElseGet {
            Log.i(TAG, "Skipping refresh toggles due to throttling")
            fetcherHeartbeatFlow.emit(HeartbeatEvent(Status.THROTTLED))
            return ToggleResponse(Status.THROTTLED)
        }

This is just a sketch to avoid having to do

unleash-android/unleashandroidsdk/src/main/java/io/getunleash/android/metrics/MetricsSender.kt

Lines 77 to 79 in 5c52d66

	} else {
	throttler.skipped()
	}

but needs to be looked at in more detail.