GrayPause 1.4: grayscale color breaks for Android

Timers that switch grayscale off and restore it on their own: presets and
custom h/m/s timers, Quick Settings tile, launcher shortcuts, countdown
notification, reboot recovery, and optional always-in-color apps via an
accessibility service. WRITE_SECURE_SETTINGS is granted once via Shizuku
or adb.

Gradle project for F-Droid with fastlane metadata and a draft fdroiddata
recipe; build.sh keeps the Gradle-free on-phone Termux build.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

app/build.gradle

@@ -0,0 +1,39 @@
+plugins {
+    id "com.android.application"
+}
+
+android {
+    namespace "com.lpw.graypause"
+    compileSdk 36
+
+    defaultConfig {
+        applicationId "com.lpw.graypause"
+        minSdk 33
+        targetSdk 36
+        versionCode 5
+        versionName "1.4"
+    }
+
+    buildTypes {
+        release {
+            minifyEnabled false
+        }
+    }
+
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_17
+        targetCompatibility JavaVersion.VERSION_17
+    }
+
+    // F-Droid: no Google-encrypted dependency metadata blob in the APK.
+    dependenciesInfo {
+        includeInApk false
+        includeInBundle false
+    }
+}
+
+dependencies {
+    def shizuku = "13.1.5"
+    implementation "dev.rikka.shizuku:api:$shizuku"
+    implementation "dev.rikka.shizuku:provider:$shizuku"
+}