Merge changes from topic "fix-shared-libs-cronet-breakage" into tm-dev

* changes:
  Parameterize the SignatureMultiLibsTest tests
  Add ResourceStore to cache extracted zip files
  Add some missing current API files for shared libraries
  Separate SignatureTest and SignatureMultiLibsTest
  Stop using shell to retrieve list of shared libraries
  signature tests: Split SignatureTest.testSignature
  signature tests: Memoize access to info derived from instrumentation args