More robust tests.

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

Bug: 275409981
Fixes: 279547610
Test: atest PackageManagerTests

Merged-In: Id68a28e9dc12f71286e29822d4b88be88ab03653
Change-Id: I49d88dbba79f7bcd8cfb8c72d2605671f27935b2

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

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