Add jarjar rule for com.android.testutils.TestBpfMap

TestBpfMap needs to be jarjar'ed to work with ConnectivityCoverageTests
which combines both framework tests and tethering tests (and their
respective jarjar rules).

Test: atest ConnectivityCoverageTests:BpfCoordinatorTest
Change-Id: Ie3e7f0be9aeb848978f0df97be48100c808086bc
diff --git a/tests/unit/jarjar-rules.txt b/tests/unit/jarjar-rules.txt
index ca88672..eb3e32a 100644
--- a/tests/unit/jarjar-rules.txt
+++ b/tests/unit/jarjar-rules.txt
@@ -1,2 +1,3 @@
 # Module library in frameworks/libs/net
 rule com.android.net.module.util.** android.net.frameworktests.util.@1
+rule com.android.testutils.TestBpfMap* android.net.frameworktests.testutils.TestBpfMap@1