Check is weak pointer is promoted correctly when getting ECO Session

Bug: 344054735
Test: atest EcoSession
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:a0098a777f3ca9e656d451902ec1123f8e1b4c09)
Merged-In: I7841e617e395465c36ac63ad5474bfe53e538690
Change-Id: I7841e617e395465c36ac63ad5474bfe53e538690