[connectivity][connectivity_platform_interface] update to git deps

packages/connectivity/connectivity/pubspec.yaml

@@ -25,7 +25,10 @@ dependencies:
     sdk: flutter
   meta: ^1.0.5
   connectivity_platform_interface:
-    path: ../connectivity_platform_interface
+    git:
+      url: https://github.com/flutter/plugins.git
+      ref: nnbd
+      path: packages/connectivity/connectivity_platform_interface
   #TODO(cyanglaz): re-endorse the below plugins when they have migrated to nnbd.
   # https://github.com/flutter/flutter/issues/68669
   connectivity_macos: ^0.1.0
@@ -41,7 +44,10 @@ dev_dependencies:
     path: ../../integration_test
   mockito: ^4.1.1
   plugin_platform_interface:
-    path: ../../plugin_platform_interface
+    git:
+      url: https://github.com/flutter/plugins.git
+      ref: nnbd
+      path: packages/plugin_platform_interface
   pedantic: ^1.10.0-nullsafety.1
 
 environment:

packages/connectivity/connectivity_platform_interface/pubspec.yaml

@@ -13,7 +13,10 @@ dependencies:
     sdk: flutter
   meta: ^1.3.0-nullsafety.3
   plugin_platform_interface:
-    path: ../../plugin_platform_interface
+    git:
+      url: https://github.com/flutter/plugins.git
+      ref: nnbd
+      path: packages/plugin_platform_interface
 
 dev_dependencies:
   flutter_test: