AI pays energy counter to keep Static Prison without exiled permanent

**Describe the bug**
AI pays energy counter to keep Static Prison even if this Static Prison doesn't exile something

**To Reproduce**
Steps to reproduce the behavior:
1. AI casts Static Prison and target player's creature
2. Player casts Tamiyo's Safekeeping
3. Static Prison ability fizzles
4. At the beginning of AI's first main phase, AI pay energy counter to save this Static Prison

**Expected behavior**
AI shouldn't pay energy counter to keep Static Prison if Static Prison doesn't exile permanent

**Desktop**
OS: Windows 10
Java Version: 1.8.0_202-b08
Forge Version: 1.6.66-SNAPSHOT-10-17

**Screenshots**