Update min_sdk_versions to match WifiTrackerLib

SettingsLib min_sdk_version (and modules dependent on it) should
match the updated min_sdk_version of WifiTrackerlib (30)

Test: build
Bug: 162368129
Change-Id: I65a3246b40fc724b157756daec635392e99141e1
diff --git a/packages/SettingsLib/Android.bp b/packages/SettingsLib/Android.bp
index f2a0e1c..44cf509 100644
--- a/packages/SettingsLib/Android.bp
+++ b/packages/SettingsLib/Android.bp
@@ -17,8 +17,8 @@
 
     // TODO(b/149540986): revert this change.
     static_libs: [
-         // All other dependent components should be put in
-         // "SettingsLibDependenciesWithoutWifiTracker".
+        // All other dependent components should be put in
+        // "SettingsLibDependenciesWithoutWifiTracker".
         "WifiTrackerLib",
     ],
 
@@ -27,9 +27,12 @@
 
     resource_dirs: ["res"],
 
-    srcs: ["src/**/*.java", "src/**/*.kt"],
+    srcs: [
+        "src/**/*.java",
+        "src/**/*.kt",
+    ],
 
-    min_sdk_version: "21",
+    min_sdk_version: "30",
 
 }