NullPointerException as googleCloudProjectNumber is passed as Integer but parsed as Long

**Describe the bug**
Thank you for this Plugin. I found the following bug in my local setup.

The `data` JSONObject property of `PluginCall`, passed into `requestIntegrityToken` is treated as Integer so the `call.getLong("googleCloudProjectNumber")` produces a NullPointerException

**To Reproduce**
Steps to reproduce the behavior:
1. In the capacitor app, call
```
await PlayIntegrity.requestIntegrityToken({
nonce: crypto.randomUUID(),
googleCloudProjectNumber: 0,
});
```
3. Run `ionic cap sync`
5. Run the Android app
6. See error on startup:
```
Serious error executing plugin
java.lang.reflect.InvocationTargetException
at java.lang.reflect.Method.invoke(Native Method)
at com.getcapacitor.PluginHandle.invoke(PluginHandle.java:138)
at com.getcapacitor.Bridge.lambda$callPluginMethod$0(Bridge.java:816)
at com.getcapacitor.Bridge.$r8$lambda$ehFTi5f4HhVNFKTbCKAYDkpQYRA(Unknown Source:0)
at com.getcapacitor.Bridge$$ExternalSyntheticLambda3.run(Unknown Source:8)
at android.os.Handler.handleCallback(Handler.java:942)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loopOnce(Looper.java:201)
at android.os.Looper.loop(Looper.java:288)
at android.os.HandlerThread.run(HandlerThread.java:67)
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'long java.lang.Long.longValue()' on a null object reference
```
**Expected behavior**
Use the `int` value passed. Potentially the `googleCloudProjectNumber` JSON property could be String typed and the String parsed to long.

**Screenshots**

**Smartphone (please complete the following information):**
- Device: Nexus 7 API 33 (Emulator)
- OS: Android 13 (Tiramisu)
- Capacitor-version: 6.0.0
- Typescript-version: 5.4.5

Start at the Android implementation of requestIntegrityToken and inspect how PluginCall data is read around call.getLong("googleCloudProjectNumber"). Reproduce the supplied integer input, then verify that the request no longer throws a NullPointerException and that the expected project number is accepted.

Written by the indexing model from the issue text.