bump min_sdk_version from 29 (Q) to 30 (R)

Mainline no longer supports Q.
These files were recently moved into p/m/C as part of a refactor.

Test: TreeHugger
Signed-off-by: Maciej Żenczykowski <maze@google.com>
Change-Id: I0f06ace921db6c79d63c0048bdb73d167ff606cf
diff --git a/staticlibs/tests/unit/Android.bp b/staticlibs/tests/unit/Android.bp
index 40371e6..031e52f 100644
--- a/staticlibs/tests/unit/Android.bp
+++ b/staticlibs/tests/unit/Android.bp
@@ -9,7 +9,7 @@
 android_library {
     name: "NetworkStaticLibTestsLib",
     srcs: ["src/**/*.java","src/**/*.kt"],
-    min_sdk_version: "29",
+    min_sdk_version: "30",
     defaults: ["framework-connectivity-test-defaults"],
     static_libs: [
         "androidx.test.rules",