fix build android apps, refs #12228

build.variables

@@ -1,4 +1,4 @@
 VERSION=1.0
 VERSION_NAME=1
 
-FLUTTER_VERSION=v1.9.1+hotfix.4
+FLUTTER_VERSION=v1.12.13+hotfix.9

pubspec.lock

@@ -7,7 +7,7 @@ packages:
       name: async
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.4.0"
+    version: "2.4.2"
   charcode:
     dependency: transitive
     description:
@@ -40,7 +40,7 @@ packages:
       name: flutter_plugin_android_lifecycle
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.0.6"
+    version: "1.0.11"
   http:
     dependency: "direct main"
     description:
@@ -54,7 +54,7 @@ packages:
       name: http_parser
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "3.1.3"
+    version: "3.1.4"
   image_picker:
     dependency: "direct main"
     description:
@@ -82,7 +82,7 @@ packages:
       name: path
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.6.4"
+    version: "1.7.0"
   path_provider:
     dependency: "direct main"
     description:
@@ -129,7 +129,7 @@ packages:
       name: source_span
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.6.0"
+    version: "1.7.0"
   sprintf:
     dependency: "direct main"
     description:
@@ -150,7 +150,7 @@ packages:
       name: stack_trace
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.9.3"
+    version: "1.9.6"
   string_scanner:
     dependency: transitive
     description:
@@ -185,7 +185,7 @@ packages:
       name: usage
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "3.4.1"
+    version: "3.4.2"
   vector_math:
     dependency: transitive
     description: