Remove unnecessary static lib from SystemUI's Android.bp

androidx.test.rules is already a dependency of SystemUI-tests-base target, and all other changes in the original commit 8168199b4aa1bbbaf8414627032a22407c4f6f78 are covered by it.

Bug: 336392614
Test: SystemUI & SystemUITests build.
Change-Id: I1e36c297aec4ffc4738327381dd58fd50ce20c45
1 file changed