Remove @Ignore from class level

AJUR doesn't support @Ignore on class level, it dumps some
invalid "null" method when it sees those. Instead only rely
on method level @Ignore.

Test: atest SystemUITests:com.android.systemui.statusbar.NonPhoneDependencyTest
Bug: 122613124
Change-Id: Ic3e2d0a77922c6bcd99554092c9048828c49a351