More robust tests.

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

Bug: 275409981
Test: atest PackageManagerTests

Change-Id: Id68a28e9dc12f71286e29822d4b88be88ab03653

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

@@ -199,10 +199,11 @@ public class PackageManagerTests extends AndroidTestCase {
         }
 
         public Intent getResult() {
-            try {
-                return mResult.take();
-            } catch (InterruptedException e) {
-                throw new RuntimeException(e);
+            while (true) {
+                try {
+                    return mResult.take();
+                } catch (InterruptedException e) {
+                }
             }
         }
     }