Introduce realtime log viewer

This contains a share button and a save button, the former using a
custom content provider.

Co-authored-by: Jason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: Harsh Shandilya <me@msfjarvis.dev>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>

ui/src/main/java/com/wireguard/android/activity/SettingsActivity.kt

@@ -4,6 +4,7 @@
  */
 package com.wireguard.android.activity
 
+import android.content.Intent
 import android.content.pm.PackageManager
 import android.os.Build
 import android.os.Bundle
@@ -100,6 +101,10 @@ class SettingsActivity : ThemeChangeAwareActivity() {
                     wgQuickOnlyPrefs.forEach { it.parent?.removePreference(it) }
                 }
             }
+            preferenceManager.findPreference<Preference>("log_viewer")?.setOnPreferenceClickListener {
+                startActivity(Intent(requireContext(), LogViewerActivity::class.java))
+                true
+            }
             val moduleInstaller = preferenceManager.findPreference<Preference>("module_downloader")
             val kernelModuleDisabler = preferenceManager.findPreference<Preference>("kernel_module_disabler")
             moduleInstaller?.isVisible = false