Add a utility to JSON-format a CSR with build info am: f4c8ff9bef am: 5b6e9e923b am: 329eeb3fc4

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/1753711

Change-Id: Iee765f7454cb31fd244abdd893193c8222736e3f