[Testing] use AndroidJUnit4 in new EuiccPreferenceControllerTest

Test: atest -c EuiccPreferenceControllerTest
Merged-In: I028ca81d38252beb3abccef9e938988510f3f55e
Change-Id: I5fcd2f3e9d2e845ec9e1e2693c10330e4292fb7a
1 file changed