Feature/bca/e2e message info

[BillCarsonFr]

Fixes #4891

Add a new developer mode screen to review cryptography info for a message. This screen allows to see details on the key sharing process, as well as to manually review incoming room key requests (that could allow to recover from an unable to decrypt error)

The new screen is accessible from the message context menu

This screen displays several informations regarding e2e:

• e2e algorithm (megolm for now)
• Megolm sessionId
• Ratchet index
• If the message sent by this device:
  - List of incoming room request from devices that couldn't decrypt
  - List of all user|device this key was originaly shared with
• If the message was sent from another device
  - An option to re-request the keys

Incoming room key requests can be reviewed, and the user can decide to manually forward the key (even if the request was declined initialy)

[github-actions]

Unit Test Results

  76 files  ±0    76 suites  ±0   54s ⏱️ -4s
144 tests ±0  144 ✔️ ±0  0 💤 ±0  0 ❌ ±0 
452 runs  ±0  452 ✔️ ±0  0 💤 ±0  0 ❌ ±0 

Results for commit 8c321ba. ± Comparison against base commit 4ce1ab2.

♻️ This comment has been updated with latest results.

[github-actions]

Matrix SDK

Integration Tests Results:

• [org.matrix.android.sdk.session]
  passed=
• [org.matrix.android.sdk.account]
  passed=
• [org.matrix.android.sdk.internal]
  passed=
• [org.matrix.android.sdk.ordering]
  passed=
• [org.matrix.android.sdk.PermalinkParserTest]
  passed=

[bmarty]

Not ready to be merged.
Please rebase and reopen.