Adding more tests around System properties

This is in preparation for clearing all system properties
between CTS tests to reduce test leakage. The code in the test
runner that explicitly sets certain values can also be removed
now that those properties have been made immutable.

Note: As part of this I discovered that java.io.tmpdir
is still mutable under the Zygote and immutable under
vogar (where it is set as a command-line arg). This means
that calling System.getProperties().clear() or
System.setProperties(null) removes the property entirely
under an Android app but not under vogar.

Change-Id: If0361b138666909b21de9d6b8a73a584e9390550

0 files changed, 0 insertions, 0 deletions