android: Expose managed configuration globally and notify listeners on changes

Triggers a broadcast if the configuration changed and updates the
profile list accordingly (previously only handled removal of multiple
profiles).

If the app resumes, the configuration is also loaded and listeners are
notified in case the config was updated while the app was in the
background.

src/frontends/android/app/build.gradle

@@ -45,6 +45,7 @@ android {
 
 dependencies {
     implementation 'androidx.appcompat:appcompat:1.6.1'
+    implementation 'androidx.lifecycle:lifecycle-process:2.7.0'
     implementation 'androidx.preference:preference:1.2.1'
     implementation 'com.google.android.material:material:1.10.0'
     testImplementation 'junit:junit:4.13.2'