[App Management] UI Fix-up For High Priority Issue

This CL fixes the most pressing issues of current UI layout:
	1. Permission item doesn't have icons.
	2. Permission item doesn't match mocks.
	3. Line height is not correct, and it should be 1.54.
	4. Font weight of header text is not right, and it should be 500.

Bug: 906508
Change-Id: I8c22cc3cd8175b2c61b335421a088f3702adaf1f
Reviewed-on: https://chromium-review.googlesource.com/c/1411192
Commit-Queue: Cecilia Ni <ceciliani@google.com>
Reviewed-by: calamity <calamity@chromium.org>
Reviewed-by: Eric Willigers <ericwilligers@chromium.org>
Cr-Commit-Position: refs/heads/master@{#624564}
19 files changed