CellGuard app: on-device IMSI-catcher detection (Kotlin/Compose)

- foreground DetectorService: cgcap capture + on-device decode
- framework CellInfo source: real serving+neighbor towers, signal, carrier name
- FrameDecoder: 0x070F cell-info SIT decode
- block-2G/3G + detection toggles via cgctl; libsu root bridge
- silent status notification + edge-triggered alerts

app/build.gradle.kts

@@ -0,0 +1,82 @@
+plugins {
+    id("com.android.application")
+    id("org.jetbrains.kotlin.android")
+}
+
+android {
+    namespace = "com.seteclabs.cellguard"
+    compileSdk = 35
+    buildToolsVersion = "35.0.0"
+
+    defaultConfig {
+        applicationId = "com.seteclabs.cellguard"
+        minSdk = 33
+        targetSdk = 35
+        versionCode = 1
+        versionName = "1.0"
+
+        vectorDrawables {
+            useSupportLibrary = true
+        }
+    }
+
+    buildTypes {
+        release {
+            isMinifyEnabled = false
+            proguardFiles(
+                getDefaultProguardFile("proguard-android-optimize.txt"),
+                "proguard-rules.pro"
+            )
+        }
+        debug {
+            isMinifyEnabled = false
+        }
+    }
+
+    compileOptions {
+        sourceCompatibility = JavaVersion.VERSION_21
+        targetCompatibility = JavaVersion.VERSION_21
+    }
+
+    kotlinOptions {
+        jvmTarget = "21"
+    }
+
+    buildFeatures {
+        compose = true
+    }
+
+    composeOptions {
+        // Kotlin 1.9.23 -> Compose compiler 1.5.11
+        kotlinCompilerExtensionVersion = "1.5.11"
+    }
+
+    packaging {
+        resources {
+            excludes += "/META-INF/{AL2.0,LGPL2.1}"
+        }
+    }
+}
+
+dependencies {
+    val composeBom = platform("androidx.compose:compose-bom:2024.06.00")
+    implementation(composeBom)
+
+    implementation("androidx.core:core-ktx:1.13.1")
+    implementation("androidx.lifecycle:lifecycle-runtime-ktx:2.8.3")
+    implementation("androidx.lifecycle:lifecycle-service:2.8.3")
+    implementation("androidx.lifecycle:lifecycle-viewmodel-compose:2.8.3")
+    implementation("androidx.activity:activity-compose:1.9.0")
+
+    implementation("androidx.compose.ui:ui")
+    implementation("androidx.compose.ui:ui-graphics")
+    implementation("androidx.compose.ui:ui-tooling-preview")
+    implementation("androidx.compose.material3:material3")
+    implementation("androidx.compose.material:material-icons-extended")
+
+    // Root access via libsu (JitPack)
+    implementation("com.github.topjohnwu.libsu:core:5.2.2")
+    implementation("com.github.topjohnwu.libsu:service:5.2.2")
+
+    debugImplementation("androidx.compose.ui:ui-tooling")
+}