Fix/suppress unittests broken on Android

test/unittests/base/platform/platform-unittest.cc

Index: test/unittests/base/platform/platform-unittest.cc
diff --git a/test/unittests/base/platform/platform-unittest.cc b/test/unittests/base/platform/platform-unittest.cc
index 06fbee004227b84ecfbe717bf45bea7f4c66e6be..b972d8ab3e65123d451511c249fcb7c48d637ba4 100644
--- a/test/unittests/base/platform/platform-unittest.cc
+++ b/test/unittests/base/platform/platform-unittest.cc
@@ -94,7 +94,13 @@ class ThreadLocalStorageTest : public Thread, public ::testing::Test {
     return reinterpret_cast<void*>(static_cast<uintptr_t>(x + 1));
   }
 
+#if defined(ANDROID)
+  // Older versions of Android have fewer TLS slots (nominally 64, but the
+  // system uses "about 5 of them" itself).
+  Thread::LocalStorageKey keys_[32];
+#else
   Thread::LocalStorageKey keys_[256];
+#endif
 };
 
 }  // namespace