* define a update hash such that com.android.cts.priv.ctsshim can't
be updated
* create a new APK to verify that <restrict-update> works as expected
Bug: 29311441
Change-Id: I61f3ae3dbd9c79b2dcdfbc30757af0f9a669fce6
The testing shim should be included as a prebuilt. This allows
us to destroy the signing key. This means that the shim can never
be upgraded in the field; aside from its intended purpose in
a CTS test.
Bug: 28398205
Change-Id: I033835d227416ff8aa6602abfc8b977c74cb666d