Make grammar changes and apply other fixes across various posts

[friendly-rabbit-35]

I encountered some grammar mistakes and other things that stuck out to me while reading some posts for #246, so this PR aims to correct them and generally enhance readability of these pages.

Notable changes:

• Android Tips
  • Reword section on /e/ OS for better flow of ideas
  • Fix broken link to PrivSec article on choosing an Android-based OS
  • Change "the remote attestation service" link to a more specific one
  • Fix Aurora Store link
  • Change the "SMS OTP" link so that it points to the appropriate section
  • Update the instructions for disabling telemetry in Google Messages (tested on version 202405028_00_RC01)
• Make changes to grammar and wording across multiple pages

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