gatt: Improve logging

Avoid printing information on found device if it is already on the allow
list or connected

Bug: 262646759
Test: manual
Tag: #feature

Merged-In: If0afe59d698d66be02105ca157bfcf330b846f3d
Change-Id: If0afe59d698d66be02105ca157bfcf330b846f3d
(cherry picked from commit 10851beb)