Fix AttributionSource usage in WifiRtt

Avoid creating AttributionSource outside of Binder thread.

Bug: 267231571
Bug: 244465118
Test: atest com.android.server.wifi
(cherry picked from commit 0317c109ab6bb2ebcf4a3391279b51a77677bd8e)
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:af9c66acbaac56b7813d79e2346b2a95197273d7)
Merged-In: Ie8c41292f28f40e44d486db4e1eec688425196c8
Change-Id: Ie8c41292f28f40e44d486db4e1eec688425196c8
2 files changed