DO NOT MERGE libbase_ndk: set min_sdk_version to "29"

libbase_ndk is used in some updatable apex modules that we launched in
Android R, hence now it needs to explicitly set minimal support sdk
version.

Test: m
Bug: 171330443
Change-Id: If3a1c9902939659e3db7f17492b3f073fdbad65f
Merged-In: If3a1c9902939659e3db7f17492b3f073fdbad65f
diff --git a/base/Android.bp b/base/Android.bp
index 4556f9b..3d96e42 100644
--- a/base/Android.bp
+++ b/base/Android.bp
@@ -108,6 +108,7 @@
             enabled: true,
         },
     },
+    min_sdk_version: "29",
 }
 
 cc_library {
@@ -133,7 +134,6 @@
         "//apex_available:anyapex",
         "//apex_available:platform",
     ],
-    min_sdk_version: "29",
 }
 
 cc_library_static {