Fixed building the incorrect phone account using iccid

Phone account has switched to subId after ag/17240597. Making
the corresponding changes.

Bug: 268399273
Test: Basic phone functionality tests
Change-Id: I73d346d168b7b1f218cb845783bacae60b84a224
(cherry picked from commit on googleplex-android-review.googlesource.com host: 6d0a5032)
Merged-In: I73d346d168b7b1f218cb845783bacae60b84a224