How to reproduce:
1. Open the user's attached project "Resolution Scaling.zip"
2. Build and Run the project to an Android device

Expected result: The Scene takes up all of the device's screen space
Actual result: The Scene takes up ~1/4th of the device's screen space

Reproducible with: 2019.4.17f1, 2020.1.17f1, 2020.2.1f1, 2021.1.0b1
Could not test with: 2018.4.30f1 (does not have the resolution scaling setting)

Reproducible on:
N/A, Meizu MX5, Android 5.0.1, CPU: MediaTek Helio X10 MT6795T, GPU: PowerVR Rogue G6200
Samsung Galaxy S5 Mini SM-G800F (according to the user)

Not reproducible on:
VLNQA00288, Samsung Galaxy J7, Android 8.1.0, CPU: Exynos 7 Octa 7870, GPU: Mali-T830
VLNQA00332, Samsung Galaxy XCover4, Android 9, CPU: Exynos 7 Quad 7570, GPU: Mali-T720
VLNQA00052, Xiaomi MI MAX, Android 7.0, CPU: Snapdragon 617 MSM8952, GPU: Adreno (TM) 510
N/A, Nokia 7 Plus, Android 10, CPU: Snapdragon 660, GPU: Adreno (TM) 512
N/A, Google Pixel XL, Android 9, CPU: Snapdragon 821 MSM8996 Pro, GPU: Adreno (TM) 530
iPhone 12 Pro (iOS 14.2.1)

Notes:
- Meizu MX5 screen is filled correctly if the Resolution Scaling Mode is set to disabled
- Fixed DPI is set to 240
- Resolution Scaling settings can be found in the Project Settings > Player > Android > Resolution and Presentation
- 2020.1 and 2020.2 was tested only on Meizu MX5 and Nokia 7 Plus