Fix JSR-166 tests.

- Remove calls to setSecurityManager, which throws unconditionally
  on android.
- Remove an unsupported AccessController check.
- Remove an assertion that the default uncaught exception handler is
  null. Regular android processes always have one installed.

bug: 20628776

(cherry picked from commit 151f344e88956741c0b8e4018df845d85d4eef25)

Change-Id: Ida7499c74586d007b8381522bec45f9a0c8fa7b4
diff --git a/jsr166-tests/src/test/java/jsr166/JSR166TestCase.java b/jsr166-tests/src/test/java/jsr166/JSR166TestCase.java
index d07d936..61fa66d 100644
--- a/jsr166-tests/src/test/java/jsr166/JSR166TestCase.java
+++ b/jsr166-tests/src/test/java/jsr166/JSR166TestCase.java
@@ -532,11 +532,7 @@
      * getPolicy/setPolicy.
      */
     public void runWithPermissions(Runnable r, Permission... permissions) {
-        SecurityManager sm = System.getSecurityManager();
-        if (sm == null) {
-            r.run();
-        }
-        runWithSecurityManagerWithPermissions(r, permissions);
+        r.run();
     }
 
     /**
@@ -548,29 +544,7 @@
      */
     public void runWithSecurityManagerWithPermissions(Runnable r,
                                                       Permission... permissions) {
-        SecurityManager sm = System.getSecurityManager();
-        if (sm == null) {
-            Policy savedPolicy = Policy.getPolicy();
-            try {
-                Policy.setPolicy(permissivePolicy());
-                System.setSecurityManager(new SecurityManager());
-                runWithSecurityManagerWithPermissions(r, permissions);
-            } finally {
-                System.setSecurityManager(null);
-                Policy.setPolicy(savedPolicy);
-            }
-        } else {
-            Policy savedPolicy = Policy.getPolicy();
-            AdjustablePolicy policy = new AdjustablePolicy(permissions);
-            Policy.setPolicy(policy);
-
-            try {
-                r.run();
-            } finally {
-                policy.addPermission(new SecurityPermission("setPolicy"));
-                Policy.setPolicy(savedPolicy);
-            }
-        }
+        r.run();
     }
 
     /**