[MagicAction] Added the gradient animation on the button outline.

Note: The gradient of outline transitions from tertiaryContainer to primaryFixedDim to primary. The animation should rotate in a clockwise spiral.

Next
- Apply animation to button text.
- Add corresponding screenshot tests.

Bug: 383567383
Test: atest SmartActionScreenshotTest
Flag: com.android.systemui.notification_magic_actions_treatment
Change-Id: Iac457ffe24c5a130ad07b02e5d94a2cae001aee8