update gradle, publishing and dependencies

[LeilaYaghoobi70]

Modernizes the build toolchain and ports the SDK to AGP 8 / Kotlin 2.

Toolchain

• Gradle 6.5 → 8.14.3, AGP 4.0 → 8.11.1, Kotlin 1.3 → 2.2.20
• compileSdk/targetSdk 29 → 36, minSdk 16 → 17, JDK 17
• AndroidX deps bumped (appcompat 1.7.1, fragment 1.8.8, core-ktx 1.17.0, constraintlayout 2.2.1)

Publishing

• Replaced Bintray (shut down) with JitPack via maven-publish

AGP 8 / Kotlin 2 migration

• Declared namespace and removed package= from manifests
• Replaced kotlin-android-extensions synthetics with findViewById
• Added android:exported to the sample launcher, enabled aidl buildFeature
• Null-safety fixes for signingInfo / signatures / applicationInfo, toUpperCase → uppercase

Version: 1.0.2 (code 4) → 1.1.0 (code 5)