Make sure server response doesn't exceed maximum allowable length

Bug: 78787521
Test: try sending response bigger than BTGATT_MAX_ATTR_LEN
Change-Id: I51b12483cced7e4c0d967acf5bb42559ef169fe7
Merged-In: I51b12483cced7e4c0d967acf5bb42559ef169fe7
(cherry picked from commit 0f34ae9398ed017465c0cac7387be9e6951c07be)
(cherry picked from commit c2813a2b6e6dda20e9a25947a4cf5adf6a4f4132)
1 file changed