Update Android Gradle Plugin to 8.11.0 and Gradle Wrapper to 8.14.3 + update default API target to 35 in tests (kivy#3172)

* 🔧 build: upgrade Gradle wrapper to `8.14.3`

* `distributionUrl` now points to `gradle‑8.14.3‑all.zip`

* 🔧 build: bump AGP to `8.11.0`, replace `jcenter()` with `mavenCentral()`

* Update `android-api` to 35 in `testapps/on_device_unit_tests/setup.py`

* Update target android.api to 35 in buildozer.spec

* Update `ANDROID_API_LEVEL` to 35 in `android.mk`

* Set `APP_PLATFORM` in `Application.mk` to use `NDK_API`

* Add `Application.mk` with `APP_PLATFORM` for service_library bootstrap

Hopefully [this](https://github.com/kivy/python-for-android/actions/runs/16309986846/job/46063689527?pr=3172) will pass

* Define `APP_ABI` variable in `Application.mk` for arch targeting

-----

cherry-pick of kivy@a8f2ca1
from kivy#3172
(minus the unit test changes, as they conflict)
(plus qt6 equivalent change)

Author: FilipeMarch

ci/makefiles/android.mk

@@ -6,7 +6,7 @@ ANDROID_NDK_VERSION_LEGACY ?= 21e
 ANDROID_SDK_TOOLS_VERSION ?= 6514223
 ANDROID_SDK_BUILD_TOOLS_VERSION ?= 29.0.3
 ANDROID_HOME ?= $(HOME)/.android
-ANDROID_API_LEVEL ?= 27
+ANDROID_API_LEVEL ?= 35
 
 # per OS dictionary-like
 UNAME_S := $(shell uname -s)

pythonforandroid/bootstraps/common/build/gradle/wrapper/gradle-wrapper.properties

@@ -3,4 +3,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.0.2-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.14.3-all.zip

pythonforandroid/bootstraps/common/build/templates/build.tmpl.gradle

@@ -2,17 +2,17 @@
 buildscript {
     repositories {
        google()
-       jcenter()
+       mavenCentral()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:8.1.1'
+        classpath 'com.android.tools.build:gradle:8.11.0'
     }
 }
 
 allprojects {
     repositories {
         google()
-        jcenter()
+        mavenCentral()
         {%- for repo in args.gradle_repositories %}
         {{repo}}
         {%- endfor %}

pythonforandroid/bootstraps/qt6/build/jni/Application.mk

@@ -5,3 +5,4 @@
 
 # APP_ABI := armeabi armeabi-v7a x86
 APP_ABI := $(ARCH)
+APP_PLATFORM := $(NDK_API)

pythonforandroid/bootstraps/service_library/build/jni/Application.mk

@@ -0,0 +1,2 @@
+APP_PLATFORM := $(NDK_API)
+APP_ABI := $(ARCH)

pythonforandroid/bootstraps/webview/build/jni/Application.mk

@@ -5,3 +5,4 @@
 
 # APP_ABI := armeabi armeabi-v7a x86
 APP_ABI := $(ARCH)
+APP_PLATFORM := $(NDK_API)