ci(travis): Remove Android 4.4, Add Android 9.0

.travis.yml

@@ -1,3 +1,7 @@
+# This Travis configuration file is built after a Cordova Paramedic 
+# specific template with minimal modifications and adaptations:
+# https://github.com/apache/cordova-paramedic/blob/master/.travis.yml
+
 sudo: false
 
 addons:
@@ -60,8 +64,6 @@ matrix:
     - env: PLATFORM=ios-12.2
       <<: *_ios
 
-    - env: PLATFORM=android-4.4
-      <<: *_android
     - env: PLATFORM=android-5.1
       <<: *_android
     - env: PLATFORM=android-6.0
@@ -74,6 +76,8 @@ matrix:
       <<: *_android
     - env: PLATFORM=android-8.1
       <<: *_android
+    - env: PLATFORM=android-9.0
+      <<: *_android
 
 before_install:
   # manually install Node for `language: android`