Revert "ConnectivityServiceTest: eliminate remaining sleep()"

CL https://android-review.googlesource.com/#/c/420720/ is
breaking several internal builds, and CL
https://android-review.googlesource.com/#/c/422481/ must
be reverted beforehand.

This reverts commit 8afb9cfd000dadc730e52ebdeb4ad031b84b8e03.

Change-Id: If0b196b6860c4087a05b28770469d7850a76fd37
1 file changed