Fix flaky CTS test SmsMessageTest#testGetSubmitPduEncodedMessage

In CDMA, the message byte array is affacted by the messageId in
BearerData, which is not consistent. Skip the two bytes when testing.

Bug: 162032461
Test: atest android.telephony.cts.SmsMessageTest#testGetSubmitPduEncodedMessage
Change-Id: Ib409619518794776c12b81bb1b5018e7ed9f9816
1 file changed