Update Java versions

Author: MillerAdulu

.github/workflows/pr-check.yml

@@ -10,10 +10,10 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - name: Set up JDK 17
+      - name: Set up JDK 21
         uses: actions/setup-java@v5
         with:
-          java-version: '17'
+          java-version: '21'
           distribution: 'adopt'
 
       - name: 📚 Git Checkout

.github/workflows/release-apk.yml

@@ -10,10 +10,10 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:   
-      - name: Set up JDK 17
+      - name: Set up JDK 21
         uses: actions/setup-java@v5
         with:
-          java-version: '17'
+          java-version: '21'
           distribution: 'adopt'
 
       - name: 📚 Git Checkout       

.github/workflows/release.yml

@@ -10,10 +10,10 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:   
-      - name: Set up JDK 17
+      - name: Set up JDK 21
         uses: actions/setup-java@v5
         with:
-          java-version: '17'
+          java-version: '21'
           distribution: 'adopt'
 
       - name: 📚 Git Checkout       

android/app/build.gradle

@@ -38,13 +38,12 @@ android {
     ndkVersion flutter.ndkVersion
 
     compileOptions {
-        sourceCompatibility JavaVersion.VERSION_17
-        targetCompatibility JavaVersion.VERSION_17
-        coreLibraryDesugaringEnabled true
+        sourceCompatibility JavaVersion.VERSION_21
+        targetCompatibility JavaVersion.VERSION_21
     }
 
     kotlinOptions {
-        jvmTarget = 17
+        jvmTarget = '21'
     }
 
     sourceSets {