Convert RenderEngineTest's setup/teardown logging from DEBUG to INFO

Some test execution configurations (including the default
`atest librenderengine`) don't include DEBUG in their logcat
collection. This can make it difficult to confirm which test execution
generated a given log message.

Bug: N/A
Change-Id: I21fc83cf474230b3f860162e80ee737ce02b4023
Test: N/A
Flag: TEST_ONLY