To reproduce:
1. Open attached project
2. Build and run "Welcome" scene on Android device
3. Notice how the screen is flickering

Actual result: The screen starts to flicker when the project opens on an Android device
Expected result: There should be no flickering when the scene opens on the Android device

Note: When setting Clear Flag to Solid Color and Skybox everything works as expected

Reproduced with: 2017.4.26f1; 2018.3.14f1; 2018.4.0f1;2019.1.1f1;2019.2.0a14; 2019.3.0a1

Tested with:
VLNQA00124, Google Pixel 2 XL (Pixel 2 XL), Android 9, CPU: Snapdragon 835 MSM8998, GPU: Adreno (TM) 540
VLNQA00144, Samsung Galaxy S9 (SM-G960U1), Android 9, CPU: Snapdragon 845 SDM845, GPU: Adreno (TM) 630
VLNQA00153, Google Pixel XL (Pixel XL), Android 9, CPU: Snapdragon 821 MSM8996 Pro, GPU: Adreno (TM) 530
VLNQA00261, Samsung Galaxy S10+ (SM-G975U), Android 9, CPU: Snapdragon 855 SM8150, GPU: Adreno (TM) 640
VLNQA00226, Qualcomm (SDM845 for arm64), Android 8.1.0, CPU: Snapdragon 845 SDM845, GPU: Adreno (TM) 630
VLNQA00111, Samsung Galaxy J5(2016) (SM-J510FN), Android 7.1.1, CPU: Snapdragon 410 MSM8916, GPU: Adreno (TM) 306
VLNQA00031, Lge Nexus 5 (Nexus 5), Android 6.0.1, CPU: Snapdragon 800 MSM8974, GPU: Adreno (TM) 330

Reproduces differently:
if you lock the phone and unlock, the phone's menu becomes a background of the app
VLNQA00138, Huawei P20 Pro (CLT-L29), Android 8.1.0, CPU: HiSilicon Kirin 970, GPU: Mali-G72
VLNQA00267, Samsung Galaxy S10+ (SM-G975F), Android 9, CPU: Exynos 9 9820, GPU: Mali-G76
VLNQA00002, Samsung Galaxy S5 Neo (SM-G903F), Android 6.0.1, CPU: Exynos 7 Octa 7580, GPU: Mali-T720

Does not reproduce with:
VLNQA00033, Samsung Galaxy Nexus (Galaxy Nexus), Android 4.3, CPU: TI OMAP 4460, GPU: PowerVR SGX 540