Update the historical API files to sig format v2

This regenerates all the historical API level signature
files to the new signature format v2, described in
tools/metalava/FORMAT.md

This was generated by metalava using these flags:
--write-android-jar-signatures <android source dir> --format=v2

Fixes: 116589402 Switch signature files over to the v2 format
Exempt-From-Owner-Approval: Large-scale tooling change
Test: make sdk
Change-Id: Ide3be4cbcb88137bd8d3a112f06126aa6370815e
29 files changed