Throw ALL the exceptions! (in the PackageManagerTests)

Change all the test method headers to throw Exception so we don't have
to try to catch anything during the tests. Catching an exception might
mask an error during the tests.

Also fix a lot of formatting errors that have built up over the years.
This includes 3-space indentations instead of 4-space, missing spaces
between braces and parens, too-long lines, wrapping when it isn't
needed, etc.

Change-Id: Ifccea5f0706b6f9235f37974a5f80bee76c654dd