fix(android): Update to API Level 30 [Android 11]

android/app/build.gradle

@@ -34,7 +34,7 @@ if (keystorePropertiesFile.exists()) {
 }
 
 android {
-    compileSdkVersion 29
+    compileSdkVersion 30
 
     sourceSets {
         main.java.srcDirs += 'src/main/kotlin'
@@ -47,7 +47,7 @@ android {
     defaultConfig {
         applicationId "app.lunasea.lunasea"
         minSdkVersion 24
-        targetSdkVersion 29
+        targetSdkVersion 30
         versionCode flutterVersionCode.toInteger()
         versionName flutterVersionName
     }