keystore2: transfer RootOfTrust from TEE to SB

Bug: 219076736
Test: manual, RoT between locally modified KeyMints
Change-Id: Iad3f14afc9d853e91cc7f7810fd6e592b48cab2d
Merged-In: Iad3f14afc9d853e91cc7f7810fd6e592b48cab2d
Ignore-AOSP-First: manual cp from aosp/2031823
1 file changed