Merge "cherrypick from mnc-docs docs: Updated APK Signature Scheme v2 doc." into mnc-io-docs am: 24c2969312 am: c34dee0c99
am: 29bd2c17f9

* commit '29bd2c17f9b9fd2453a2aa127f39ffde67d02cbc':
  cherrypick from mnc-docs docs: Updated APK Signature Scheme v2 doc.

Change-Id: I1ca414222489ef1cc3358607d81f7c63a39c15b9