Move to newer clang annotations

Also enable -Wthread-safety-negative.

Changes:
Switch to capabilities and negative capabilities.

Future work:
Use capabilities to implement uninterruptible annotations to work
with AssertNoThreadSuspension.

Bug: 20072211

Change-Id: I42fcbe0300d98a831c89d1eff3ecd5a7e99ebf33
diff --git a/runtime/mirror/object_test.cc b/runtime/mirror/object_test.cc
index 85ea28f..f5a0445 100644
--- a/runtime/mirror/object_test.cc
+++ b/runtime/mirror/object_test.cc
@@ -48,7 +48,7 @@
                     const char* utf8_in,
                     const char* utf16_expected_le,
                     int32_t expected_hash)
-      SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
+      SHARED_REQUIRES(Locks::mutator_lock_) {
     std::unique_ptr<uint16_t[]> utf16_expected(new uint16_t[expected_utf16_length]);
     for (int32_t i = 0; i < expected_utf16_length; i++) {
       uint16_t ch = (((utf16_expected_le[i*2 + 0] & 0xff) << 8) |