RESTRICT AUTOMERGE Fix phishing attacks over Bluetooth due to unclear warning message

This CL add more prompts presented for users to avoid phishing attacks.

Screenshot:
https://screenshot.googleplex.com/p5PZbphN46ddPFV.png
https://screenshot.googleplex.com/6Q2wKfPbNQmTtx8.png
https://screenshot.googleplex.com/987VpYgNUZL2K4T.png
https://screenshot.googleplex.com/9eVg6SAGScVXU8U.png

Bug: 167403112
Test: manually test
Change-Id: Iadec059b662fd91754ad573bbe688702cdd3c9af
(cherry picked from commit 10e459921953825d34e70cc4da846aac703d913c)
(cherry picked from commit 80d8b03d027f3dffb85958f849be3b5316791107)
3 files changed