Centralize NDK and CMAKE versions

Signed-off-by: Álvaro Brey Vilas <alvaro.brey@nextcloud.com>

.github/workflows/qa.yml

@@ -20,7 +20,9 @@ jobs:
                     distribution: "temurin"
                     java-version: 11
             -   name: Install NDK and cmake
-                run: /usr/local/lib/android/sdk/tools/bin/sdkmanager 'ndk;21.4.7075529' 'cmake;3.18.1'
+                run: |
+                    source ndk.env
+                    /usr/local/lib/android/sdk/tools/bin/sdkmanager "ndk;${NDK_VERSION}" "cmake;${CMAKE_VERSION}"
             -   name: Build QA
                 if: ${{ steps.check-secrets.outputs.ok == 'true' }}
                 env:

app/build.gradle

@@ -69,11 +69,18 @@ def versionMinor = 20
 def versionPatch = 0
 def versionBuild = 0 // 0-50=Alpha / 51-98=RC / 90-99=stable
 
+
+def ndkEnv = new HashMap<String, String>()
+file("$project.rootDir/ndk.env").readLines().each() {
+    def (key, value) = it.tokenize('=')
+    ndkEnv.put(key, value)
+}
+
 android {
 
     compileSdkVersion 31
     // install this NDK version and Cmake to produce smaller APKs. Build will still work if not installed
-    ndkVersion "21.4.7075529"
+    ndkVersion "${ndkEnv.get("NDK_VERSION")}"
 
     defaultConfig {
         minSdkVersion 23

ndk.env

@@ -0,0 +1,2 @@
+NDK_VERSION=21.4.7075529
+CMAKE_VERSION=3.18.1