Tweak systrace calls

Tracing needed a few tweaks.

First, add overall tracing for all of the incoming methods that cause a
package to go through the install flow -- installPackageAsUser, installStage
and movePackage.

Second, add a few more traces for things such as dexopt.

Third, adjust some of the calls; avoid using the async trace methods
when they're not necessary, etc...

Change-Id: Iff47189ddad4478d9fbc6eac2f7031e54cba6271