Update Android project configuration and permissions

- Added new entries to .gitignore to exclude Android build artifacts and keystore files.
- Updated build.gradle files to include Kotlin Gradle plugin dependencies.
- Enhanced gradle.properties with JVM arguments for better performance.
- Modified AndroidManifest.xml to include additional permissions for network and location access.
- Refactored package names in several classes to use a new namespace.
- Removed deprecated LogActivity, SelectedApplicationsActivity, SettingsActivity, and TrustedCertificatesActivity.
- Introduced a new scheduling mechanism in the Scheduler class to handle exact alarms on Android 13+.
- Updated MainActivity to integrate new UI components.

These changes improve the overall structure and functionality of the Android application.

src/frontends/android/app/build.gradle

@@ -1,57 +0,0 @@
-apply plugin: 'com.android.application'
-
-android {
-    namespace = 'org.strongswan.android'
-
-    defaultConfig {
-        applicationId "org.strongswan.android"
-        compileSdk = 36
-        minSdkVersion 21
-        targetSdkVersion 36
-
-        versionCode 96
-        versionName "2.6.2"
-
-        externalNativeBuild {
-            ndkBuild {
-                arguments '-j' + Runtime.runtime.availableProcessors()
-            }
-        }
-    }
-
-    ndkVersion = "27.3.13750724"
-
-    externalNativeBuild {
-        ndkBuild {
-            path 'src/main/jni/Android.mk'
-        }
-    }
-
-    tasks.withType(JavaCompile).configureEach {
-        compileTask ->
-            options.compilerArgs << "-Xlint:unchecked" << "-Xlint:deprecation"
-    }
-
-    buildTypes {
-        release {
-            minifyEnabled false
-            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.txt'
-        }
-    }
-    compileOptions {
-        targetCompatibility 1.8
-        sourceCompatibility 1.8
-    }
-}
-
-dependencies {
-    implementation 'androidx.appcompat:appcompat:1.7.1'
-    implementation 'androidx.core:core:1.17.0'
-    implementation 'androidx.lifecycle:lifecycle-process:2.9.4'
-    implementation 'androidx.preference:preference:1.2.1'
-    implementation 'androidx.localbroadcastmanager:localbroadcastmanager:1.1.0'
-    implementation 'com.google.android.material:material:1.13.0'
-    testImplementation 'junit:junit:4.13.2'
-    testImplementation 'org.assertj:assertj-core:3.27.6'
-    testImplementation 'org.mockito:mockito-core:5.20.0'
-}