Steps to reproduce:
1. Open attached project
2. Build and run for android
-White screen appears for 2~ seconds and then unity logo appears

Expected result: white screen shouldn't take 2 seconds just like in 5.5 or 5.4 unity
Actual result: White screen is shown during application launch for about 2 sec(depends on device, some take longer)

Note: in 2017.1.x white screen appears as well but takes less time than in 5.6 to initialise

Reproduced on: 5.6.1p1, 5.6.1f1
Not reproduced on: 5.4.2p2, 5.5.2p2, 2017.1.0b7

Devices under test:

Reproduced with:
Sony D6503, OS:6.0.1, CPU:armeabi-v7a, GPU:Adreno (TM) 330, Build:Sony/D6503/D6503:6.0.1/23.5.A.1.291/2769308465:user/release-keys
Xiaomi Redmi Note 3, OS:5.1.1, CPU:arm64-v8a, GPU:Adreno (TM) 510, Build:Xiaomi/kenzo/kenzo:5.1.1/LMY47V/V8.0.7.0.LHOCNDG:user/release-keys
Samsung SM G925F (Galaxy S6 Edge), OS:7.0, CPU:arm64-v8a, GPU:Mali-T760, Build:samsung/zeroltexx/zerolte:6.0.1/MMB29K/G925FXXU5DQA7:user/release-keys