updater: Fix the wrong return value for package_extract_file().

'bool success = ExtractEntryToFile()' gives opposite result. Fix the
issue and add testcases.

Change the one-argument version of package_extract_file() to explicitly
abort for non-existent zip entry. Note that this is NOT changing the
behavior. Prior to this CL, it aborts from Evaluate() function, by
giving a general cause code. Now it returns kPackageExtractFileFailure.

BUg: 32903624
Test: recovery_component_test works.

Change-Id: I7a273e9c0d9aaaf8c472b2c778f7b8d90362c24f