Merge | SqlCommand Public Properties (#3611)

* Merge:
* _parameters
* _pendingCancel
* _preparedConnectionCloseCount
* _preparedConnectionReconnectCount
* _prepareHandle
* s_cachedInvalidPrepareHandle
* Statistics

* Merge Connection, DbConnection

* Merging RetryLogicProvider and _retryLogicProvider

# Conflicts:
#	src/Microsoft.Data.SqlClient/src/Microsoft/Data/SqlClient/SqlCommand.cs

* Merge Transaction, DbTransaction

* Merge CommandText
* Replace "" with string.Empty

* Merge CommandTimeout, _commandTimeout, and ADP.InvalidCommandTimeout

* Merge CommandType
* Removed temp storage of _commandType

* Merge ColumnEncryptionSetting, _columnEncryptionSetting

* Merge Parameters and DbParameterCollection

* Merging DesignTimeVisible, _designTimeVisible

* Merging EnableOptimizedParameterBinding, UpdatedRowSource, _updatedRowSource

* Merge StatementCompleted and _statementCompletedEventHandler

* Merging Notification, NotificationAutoEnlist, _notification, _notificationAutoEnlist, _sqlDep

* Merge DefaultCommandTimeout, InternalTdsConnection, IsColumnEncryptionEnabled, InternalRecordsAffected, _rowsAffected, PropertyChanging()

* merge _transaction and _batchRPCMode

* Restore ResetCommandTimeout that got accidentally obliterated in a previous commit

* Fix logic issue in IsColumnEncryptionEnabled, reinstate TypeDescriptor.Refresh on netfx

Author: benrr101