This is a combination of two commits against b/409868905, merged for
backport convenience. It updates the string and button style for the BT
pairing dialog.
Bug: 236134583
Bug: 236134775
Test: local tested
Flag: EXEMPT minor style update
Cherrypick-From: https://googleplex-android-review.googlesource.com/q/commit:22378fd5a1bb2ca8d63f5df4e47c0af218c66a57
Merged-In: Icd9f509b5363b3ec3900738e21486e54d4e66e4b
Change-Id: Icd9f509b5363b3ec3900738e21486e54d4e66e4b