Steps to reproduce:
1. Open ReflectionProbes project
2. Build for android
3. Observe black fuzz on the wall in the Corridor1 scene

Expected: There should be no black artifacting
Actual: Certain parts of the wall are covered in black dots

Reproduced on: 2018.3.0a6, 2018.2.2f1, 2018.1.9f1, 2017.4.7f1

Devices Under Test:
Repro:
VLNQA00121, Samsung Galaxy S9 (SM-G960F), 8.0.0, CPU: Exynos 9 Series 9810, GPU: Mali-G72
VLNQA00009, Samsung Galaxy Note8 (SM-N950F), 7.1.1, CPU: Exynos 9 Octa 8895, GPU: Mali-G71
VLNQA00111, Samsung Galaxy J5(2016) (SM-J510FN), 6.0.1, CPU: Snapdragon 410 MSM8916, GPU: Adreno (TM) 306
VLNQA00124, Google Pixel 2 XL (Pixel 2 XL), 8.1.0, CPU: Snapdragon 835 MSM8998, GPU: Adreno (TM) 540
VLNQA00060, Motorola Moto X (1st Gen) (XT1053), 4.4.4, CPU: Snapdragon S4 Plus MSM8960, GPU: Adreno (TM) 320
VLNQA168, Amazon FIRE (KFDOWI), 5.1.1, CPU: ARM Cortex-A53, GPU: Mali-T720
VLNQA00078, Motorola Nexus 6 (Nexus 6), 7.1.1, CPU: Snapdragon 805 APQ8084AB, GPU: Adreno (TM) 420
VLNQA166, Huawei P20 (EML-L29), 8.1.0, CPU: Hisilicon Kirin 970, GPU: Mali-G72

No repro:
VLNQA00072, Google Pixel C (Pixel C), 8.1.0, CPU: nVIDIA Tegra X1 T210, GPU: NVIDIA Tegra
VLNQA00155, Meizu PRO 7 Plus, GPU: PowerVR Rogue Marlowe

By design: caused by low resolution/quality normalMap texture and it's compression. Disabling compression removes artifacts