This commit includes breaking changes, see the change record for more info: https://www.drupal.org/node/2836073

Enforce result and reports and added plugin incoming event
Fixed failing tests
Added results and reports for incoming messages created in tests.
Added createMessageResult test helper to create reports and result for a message.
Fixed failing tests due to missing reports
Test coverage for new result/report exceptions
Compacted sms_test_gateway gateway config schema (Derivative types)
Added plugin incoming method to execution order tests.
New test file covering \Drupal\sms\EventSubscriber\SmsMessageProcessor (some \Drupal\Tests\sms\Kernel\SmsFrameworkProviderTest tests should be moved there)
Added supports incoming messages gateway annotation property.
Added SmsGateway::supportsIncoming()
Add preprocess check to incoming messages ensuring they have a gateway set, and the gateway supports incoming messages.
Added tests for above.
Added missing gateway entity to incoming message tests.

Message direction is automatically set if SmsProvider send or incoming methods.
Added new exception: \Drupal\sms\Exception\SmsDirectionException
An exception is thrown if message direction is missing when passed to SmsProvider::queue

Fixed dpi/smsframework#65

Introduces test utility methods for a incoming message storage buffer, similar to the pre-existing outgoing message buffer.

Fixed dpi/smsframework#64

Includes tests for validation exception messages.

It did not get removed with https://www.drupal.org/node/2788473 because it was named incorrectly

Removed submodules which no longer exist.
Updated information regarding hooks, which changed to events.

Issue #2707723 by dpi: Changing terminology and config keys to more accurately describe functions introduced by the register-account-via-sms feature.

Added test coverage for \Drupal\sms\Event\RecipientGatewayEvent
Add ID detect to createMemoryGateway so the id passed to settings is correct.

Fixed dpi/smsframework#47

createPhoneNumberSettings will now create form displays if they don't exist.

Fixed dpi/smsframework#44

Fixed dpi/smsframework#43

Issue #2776751 by dpi: Harmonise APIs for Entity\SmsMessageInterface and Message\SmsMessageInterface

Removed provider::queueIn()
Removed provider::queueOut()
Allowing standard messages on queue(), not just entity.
Promoted set/getDirection from message entity to common method.
Promoted direction tests to message trait, which enables coverage on both message classes.

Fixed dpi/smsframework#42