Bump navigation-fragment-ktx in /SafDemos

Bumps navigation-fragment-ktx from 2.3.0-alpha04 to 2.4.0-alpha07.

---
updated-dependencies:
- dependency-name: androidx.navigation:navigation-fragment-ktx
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

SafDemos/app/build.gradle

@@ -55,7 +55,7 @@ dependencies {
     implementation "androidx.appcompat:appcompat:1.1.0"
     implementation "androidx.core:core-ktx:1.2.0"
     implementation "androidx.constraintlayout:constraintlayout:1.1.3"
-    implementation "androidx.navigation:navigation-fragment-ktx:2.3.0-alpha04"
+    implementation "androidx.navigation:navigation-fragment-ktx:2.4.0-alpha07"
     implementation "androidx.navigation:navigation-ui-ktx:2.3.0-alpha04"
 
     implementation "com.google.android.material:material:1.1.0"