Steps to reproduce:
1. Open new project
2. Set up video player to output a Render Texture.
3. Set Render texture on Image on UI
4. Set up button to "Enable" and "Disable" video player at runtime
5. Transcode attached video to H265
6. Build for Android
7. Observe line of garbage at the bottom of player.
8. Enable disable the video player if app hasn't crashed yet

Expected: Video plays in the new transcoded format
Actual: Hundreds of dropped frames per second and when enabling disabling player app crashes

Reproduced on:
Version 2019.1.0a12 (8459c3aa6e20)
Fri, 30 Nov 2018 20:45:07 GMT
Branch: platform/android/vulkan-video-player

Devices Under Test:
VLNQA00129, Nvidia SHIELD Tablet (SHIELD Tablet), Android 6.0.1, CPU: nVIDIA Tegra K1 T124, GPU: NVIDIA Tegra
VLNQA00093, Samsung Galaxy S6 edge (SM-G925F), Android 7.0, CPU: Exynos 7 Octa 7420, GPU: Mali-T760
VLNQA00003, Razer Razer Phone (Phone), Android 7.1.1, CPU: Snapdragon 835 MSM8998, GPU: Adreno (TM) 540
VLNQA00125, Google Pixel 2 (Pixel 2), Android 8.1.0, CPU: Snapdragon 835 MSM8998, GPU: Adreno (TM) 540
VLNQA00138, Huawei P20 Pro (CLT-L29), Android 8.1.0, CPU: HiSilicon Kirin 970, GPU: Mali-G72