Ionic/Angular/Cordova/Android - cannot find symbol

Hello,

I am upgrading a pretty old project build on Ionic/Cordova/Angular with latest packages, and I am encourteing an issue on Android.

I upgraded my project to ionic 6 and Angular 14. I also upgraded all plugins with @awesome-cordova-plugins.

RevenueCat plugins are also updated.

package.json:

```

"@awesome-cordova-plugins/purchases": "^6.2.0",

"cordova-plugin-purchases": "^3.3.3",

```

Everything works fine on iOS.

I ran into an issue when I try to build for Android

I upgraded minSdk to 31, and installed JDK 11.

Ionic documentation says we must use JDK 8, but I can’t build anything too because it needs sdk >= 31.

config.xml:

```

    <preference name="android-minSdkVersion" value="22" />
    <preference name="android-targetSdkVersion" value="31" />
    <preference name="android-compileSdkVersion" value="31" />

```

terminal:

```

[cordova] /Users/user/Sites/project/ionic/platforms/android/app/src/main/java/cc/fovea/PurchasePlugin.java:386: error: cannot find symbol
[cordova]       if (p.getSku().equals(sku))
[cordova]            ^
[cordova]   symbol:   method getSku()
[cordova]   location: variable p of type Purchase
[cordova] /Users/user/Sites/project/ionic/platforms/android/app/src/main/java/cc/fovea/PurchasePlugin.java:554: error: cannot find symbol
[cordova]       params.setOldSku(oldSku, oldPurchaseToken);
[cordova]             ^
[cordova]   symbol:   method setOldSku(String,String)
[cordova]   location: variable params of type Builder
[cordova] /Users/user/Sites/project/ionic/platforms/android/app/src/main/java/cc/fovea/PurchasePlugin.java:587: error: cannot find symbol
[cordova]         params.setReplaceSkusProrationMode(BillingFlowParams.ProrationMode.IMMEDIATE_WITH_TIME_PRORATION);
[cordova]               ^
[cordova]   symbol:   method setReplaceSkusProrationMode(int)
[cordova]   location: variable params of type Builder
[cordova] /Users/user/Sites/project/ionic/platforms/android/app/src/main/java/cc/fovea/PurchasePlugin.java:589: error: cannot find symbol
[cordova]         params.setReplaceSkusProrationMode(BillingFlowParams.ProrationMode.IMMEDIATE_AND_CHARGE_PRORATED_PRICE);
[cordova]               ^
[cordova]   symbol:   method setReplaceSkusProrationMode(int)
[cordova]   location: variable params of type Builder
[cordova] /Users/user/Sites/project/ionic/platforms/android/app/src/main/java/cc/fovea/PurchasePlugin.java:591: error: cannot find symbol
[cordova]         params.setReplaceSkusProrationMode(BillingFlowParams.ProrationMode.IMMEDIATE_WITHOUT_PRORATION);
[cordova]               ^
[cordova]   symbol:   method setReplaceSkusProrationMode(int)
[cordova]   location: variable params of type Builder
[cordova] /Users/user/Sites/project/ionic/platforms/android/app/src/main/java/cc/fovea/PurchasePlugin.java:593: error: cannot find symbol
[cordova]         params.setReplaceSkusProrationMode(BillingFlowParams.ProrationMode.DEFERRED);
[cordova]               ^
[cordova]   symbol:   method setReplaceSkusProrationMode(int)
[cordova]   location: variable params of type Builder
[cordova] /Users/user/Sites/project/ionic/platforms/android/app/src/main/java/cc/fovea/PurchasePlugin.java:629: error: cannot find symbol
[cordova]           + " Replace old SKU? " + (params.getOldSku() != null));
[cordova]                                           ^
[cordova]   symbol:   method getOldSku()
[cordova]   location: variable params of type BillingFlowParams
[cordova] Note: Some input files use or override a deprecated API.
[cordova] Note: Recompile with -Xlint:deprecation for details.
[cordova] Note: Some input files use unchecked or unsafe operations.
[cordova] Note: Recompile with -Xlint:unchecked for details.
[cordova] 7 errors
[cordova] 
[cordova] FAILURE: Build failed with an exception.

```

Any idea what is causing this problem?