More robust tests.

https://android-build.corp.google.com/test_investigate/?invocationId=I89000010151050377&testResultId=TR75528603005220067

Bug: 290699552
Test: atest PackageManagerTests

Merged-In: Id68a28e9dc12f71286e29822d4b88be88ab03653
Change-Id: Id68a28e9dc12f71286e29822d4b88be88ab03653
(cherry picked from commit 18e9fa7232)

services/tests/PackageManagerServiceTests/server/src/com/android/server/PackageManagerTests.java

@@ -197,10 +197,11 @@ public class PackageManagerTests extends AndroidTestCase {
         }
 
         public Intent getResult() {
+            while (true) {
                 try {
                     return mResult.take();
                 } catch (InterruptedException e) {
-                throw new RuntimeException(e);
+                }
             }
         }
     }