platform/frameworks/base/ - S is now 31

Bug: 171506470
Test: Build
Change-Id: I46d4df5f27783a96a58c966b113391ea3bc112cb
diff --git a/tools/aapt2/SdkConstants.cpp b/tools/aapt2/SdkConstants.cpp
index e8873bf..96f6512 100644
--- a/tools/aapt2/SdkConstants.cpp
+++ b/tools/aapt2/SdkConstants.cpp
@@ -58,7 +58,8 @@
     {0x056d, SDK_O_MR1},
     {0x0586, SDK_P},
     {0x0606, SDK_Q},
-    {0x0617, SDK_R},
+    {0x0616, SDK_R},
+    {0x064b, SDK_S},
 };
 
 static bool less_entry_id(const std::pair<uint16_t, ApiVersion>& p, uint16_t entryId) {