Remove prefix kSendFlag_ from enum class SendMessageFlag and kExchangeFlag_ from ExFlagValues

[yufengwangca]

Problem

enum class SendMessageFlags : uint16_t
{
kSendFlag_None = 0x0000,
/< Used to indicate that automatic retransmission is enabled. */
kSendFlag_AutoRetrans = 0x0001,
/< Used to indicate that a response is expected within a specified timeout. */
kSendFlag_ExpectResponse = 0x0002,
/< Used to indicate that the sending of the current message needs to be delayed. */
kSendFlag_DelaySend = 0x0008,
/< Used to indicate that the source node ID in the message header can be reused. */
kSendFlag_ReuseSourceId = 0x0020,
/< Used to indicate that the message is already encoded. */
kSendFlag_AlreadyEncoded = 0x0080,
/< Used to indicate that default IPv6 source address selection should be used when sending IPv6 multicast messages. */
kSendFlag_DefaultMulticastSourceAddress = 0x0100,
/< Used to indicate that the current message is the initiator of the exchange. */
kSendFlag_FromInitiator = 0x0200,
/< Used to send a ReliableMessageProtocol message requesting an acknowledgment. */
kSendFlag_RequestAck = 0x0400,
/**< Suppress the auto-request acknowledgment feature when sending a message. */
kSendFlag_NoAutoRequestAck = 0x0800,
};

The actual flag name should be SendMessageFlags::NoAutoRequestAck and similar for all the other flags. As in, the "kSendFlag_" part is redundant with the enum class name already.

Proposed Solution

Remove prefix kSendFlag_ from enum class SendMessageFlag and kExchangeFlag_ bit from ExFlagValues