Simplify find current banner and voice instructions algorithms

[Guardiola31337]

Follow up from #1095

• Simplifies findCurrentBannerInstructions and findCurrentVoiceInstructions algorithms from RouteUtils

cc @dsilvera

[Guardiola31337]

findCurrentBannerInstructions_clearsAllInvalidInstructions from RouteUtilsTest is failing in CI when bringing in the new changes 👀

com.mapbox.services.android.navigation.v5.utils.RouteUtilsTest > findCurrentBannerInstructions_clearsAllInvalidInstructions FAILED
    junit.framework.AssertionFailedError at RouteUtilsTest.java:229

Could you take a look at it and try to fix it @dsilvera?
You can run the whole suite executing $> ./gradlew test

Let us know if you have any questions. Thanks!

[danesfeder]

@Guardiola31337 noting that this test is probably not needed with the new algorithm setup

[Guardiola31337]

noting that this test is probably not needed with the new algorithm setup

Yeah, that's what I was 👀 - with the new algo we're not removing the elements anymore.

Going ahead and removing that test.

Thanks for confirming @danesfeder

[Guardiola31337]

Could you take a look at it and try to fix it @dsilvera?

Nevermind @dsilvera as I said #1117 (comment) I went ahead and removed the pointless test and now tests should be ✅

Thanks again for the contribution!

[danesfeder]

Once CI ✅ thanks a lot for the contribution @dsilvera!