fix(deps): update dependency androidx.activity:activity-ktx to v1.9.1 (#3283)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

.changeset/flat-brooms-float.md

@@ -0,0 +1,5 @@
+---
+"@rnx-kit/react-native-test-app-msal": patch
+---
+
+Bumped `androidx.activity:activity-ktx` to 1.9.1

incubator/react-native-test-app-msal/android/build.gradle

@@ -173,7 +173,7 @@ android {
 dependencies {
     def kotlinVersionNumber = toVersionNumber(kotlinVersion)
     if (kotlinVersionNumber >= 10800) {
-        implementation "androidx.activity:activity-ktx:1.8.2"
+        implementation "androidx.activity:activity-ktx:1.9.1"
     } else {
         implementation(["androidx.activity", "activity-ktx", "1.6.1"].join(":"))
     }