Sending to android via GRPC not work after update

**App version: 1.18.3, 1.18.4**

**Deploy environment: kubernetes**

**Config:**
```yaml
android:
enabled: true
key_path: "/vault/secrets/fcmkey.json"
max_retry: 0
api:
config_uri: /api/config
health_uri: /healthz
metric_uri: /metrics
push_uri: /api/push
stat_app_uri: /api/stat/app
stat_go_uri: /api/stat/go
sys_stat_uri: /sys/stats
core:
enabled: true
max_notification: 100
mode: release
pid:
enabled: false
override: true
path: gorush.pid
port: "8088"
queue_num: 0
shutdown_timeout: 30
worker_num: 0
grpc:
enabled: true
port: 9000
huawei:
enabled: true
appsecret: "*****159e1a78c**********"
appid: "*************"
max_retry: 0
ios:
enabled: false
log:
access_level: debug
access_log: stdout
error_level: error
error_log: debug
format: string
hide_messages: true
hide_token: true
queue:
engine: redis
redis:
addr: gorush-dev-redis-master:6379
group: gorush
consumer: gorush
stream_name: gorush
stat:
engine: memory
```

**Postman request:**
```json
{
"platform": 2,
"tokens": ["********_GdIgJYxXOcBd:APA91bFfWcR_RGaHavl1fdgeLJcvFPsPLEbH8jdgoJERpiKKO6yEttX-RNf2TLyo99CqvWZUK43jyCbmqfrbZOBS*********"],
"data": {
"fields": {
"title": {
"string_value": "123"
}
}
}
}
```

Postman responde:
```json
{
"success": true,
"counts": 1
}
```

**Log:**
```json
{"level":"debug","msg":"Start push notification for Android","time":"2024-06-21T10:39:40Z"}
{"level":"debug","msg":"Android Success count: 0, Failure count: 1","time":"2024-06-21T10:39:40Z"}
```

If i rollback to 1.18.2 it work fine.

Reproduce the Android push through the gRPC endpoint using the supplied Kubernetes configuration and Postman request, then compare behavior between versions 1.18.2 and 1.18.3. Trace the Android notification path around the reported success and failure counts; done means the same request delivers successfully on the newer version.

Written by the indexing model from the issue text.