Add new device kMTUProperty and remove deprecated kGattServicesProperty

"MTU" was added in crosreview.com/1043496

BUG=b:78593133
TEST=CQ will verify this
Change-Id: I6dbf8ea04082387df1efcc2b25ce12fa2d263ec4
Reviewed-on: https://chromium-review.googlesource.com/1048840
Commit-Ready: Qiyu Hu <qiyuh@google.com>
Tested-by: Qiyu Hu <qiyuh@google.com>
Reviewed-by: Miao-chen Chou <mcchou@chromium.org>
1 file changed