Add package for oppo/oneplus tablet products

**Your phone model: OnePlus Pad (OPD2407)**

**Packages:**

```
com.oplus.studycenter
com.oplus.ovoicemanager.wakeup
```

- [x] **I removed all those packages on my phone**
If not why. Leave the brackets blank and explain why.

### com.oplus.studycenter

**List**: `OEM`
**Removal**: `Recommended`

> Study Center is an educational application officially developed by OPPO for children aged 0-12. Featuring core functionalities including Health Protection, Parental Guardianship, and Peer Study Sessions, it delivers an integrated and immersive learning experience for young learners. (ONLY FOR CHINA.)

Pithus Analysis: https://beta.pithus.org/report/e006d8b22e473e603ceb86c654889e08da460b73d609cd9b17642f49d530239a

### com.oplus.ovoicemanager.wakeup

**List**: `OEM`
**Removal**: `Recommended`

> Voice Assistant related. A component for com.oplus.ovoicemanager.

Look at the existing package definitions in the data directory, likely under `data/packages/`. Find similar OEM packages for OnePlus or OPPO to understand the format. Add entries for `com.oplus.studycenter` and `com.oplus.ovoicemanager.wakeup` with the provided descriptions and removal recommendations. Verify the changes by building and running the tool to ensure the new packages appear correctly.

Written by the indexing model from the issue text.