Revert "Revert "Android Q is API 29""

This reverts commit 60c71cee6ec064a0d2f4c6608fdb54bf95545d45.

Reason for revert: Rolling forward for Q-Finalization

Bug: 131429032
Bug: 129975435
Change-Id: Idd812d93b767d8a672b9ada58c8bcc2441395847
diff --git a/tools/aapt/SdkConstants.h b/tools/aapt/SdkConstants.h
index c1fcf5c..27ffcdf 100644
--- a/tools/aapt/SdkConstants.h
+++ b/tools/aapt/SdkConstants.h
@@ -44,6 +44,7 @@
     SDK_O = 26,
     SDK_O_MR1 = 27,
     SDK_P = 28,
+    SDK_Q = 29,
 };
 
 #endif // H_AAPT_SDK_CONSTANTS