Add more gradle sub projects (#1997)

Summary:
I don't fully understand how dependabot works with Android but it seems to only look at the literal fbjni version number based on the logs and we're actually outdated on a bunch of dependencies which Gradle doesn't handle very well.

Pull Request resolved: https://github.com/facebook/flipper/pull/1997

Test Plan: Tested on my fork and I've got a ton of PRs because of this. Brace yourselves.

Reviewed By: mweststrate

Differential Revision: D26784112

Pulled By: passy

fbshipit-source-id: 98ebd0b899a0603868d4b6bc0866e557c87fecd5

.github/dependabot.yml

@@ -24,12 +24,66 @@ updates:
     interval: weekly
     time: '13:00'
   open-pull-requests-limit: 10
+- package-ecosystem: gradle
+  directory: "/"
+  schedule:
+    interval: weekly
+    time: '13:00'
+  open-pull-requests-limit: 10
 - package-ecosystem: gradle
   directory: "/android"
   schedule:
     interval: weekly
     time: '13:00'
   open-pull-requests-limit: 10
+- package-ecosystem: gradle
+  directory: "/android/tutorial"
+  schedule:
+    interval: weekly
+    time: '13:00'
+  open-pull-requests-limit: 10
+- package-ecosystem: gradle
+  directory: "/android/sample"
+  schedule:
+    interval: weekly
+    time: '13:00'
+  open-pull-requests-limit: 10
+- package-ecosystem: gradle
+  directory: "/android/no-op"
+  schedule:
+    interval: weekly
+    time: '13:00'
+  open-pull-requests-limit: 10
+- package-ecosystem: gradle
+  directory: "/android/plugins/fresco"
+  schedule:
+    interval: weekly
+    time: '13:00'
+  open-pull-requests-limit: 10
+- package-ecosystem: gradle
+  directory: "/android/plugins/network"
+  schedule:
+    interval: weekly
+    time: '13:00'
+  open-pull-requests-limit: 10
+- package-ecosystem: gradle
+  directory: "/android/plugins/litho"
+  schedule:
+    interval: weekly
+    time: '13:00'
+  open-pull-requests-limit: 10
+- package-ecosystem: gradle
+  directory: "/android/plugins/leakcanary"
+  schedule:
+    interval: weekly
+    time: '13:00'
+  open-pull-requests-limit: 10
+- package-ecosystem: gradle
+  directory: "/android/plugins/leakcanary2"
+  schedule:
+    interval: weekly
+    time: '13:00'
+  open-pull-requests-limit: 10
 - package-ecosystem: cargo
   directory: "/packer"
   schedule: