[Android] Pin message bugs

[sheisThanhHien]

1. Cache list pin when pinning attachment messages

1. Steps to reproduce:

1. Send an image A
2. Pin message image A --> Open list pin and check
3. Send an image B
4. Pin message image B --> Open list pin and check

2. Actual Result:

• Duplicate message image A in list pin

3. Evidence

2062069614992429056.1.mp4

2. System message pin message

Actual Result: full blue text

Expected Result:

• only blue text a message
• able to tap on a message to jump to the pinned message

3. Empty pin by pinning poll