Restore checkSystemServerOrder

Move checkSystemServerOrder into the java package so it can filter out
bootclasspathDependencyTag dependencies in order to prevent traversing
into bootclasspath dependencies and confusing them with system server
classpath dependencies.

Bug: 397461231
Test: TestCheckSystemServerOrderWithArtApex
Change-Id: I64630eb2edfcffe796cc5eb47c08ed167a6ff0dd