Apply proximity wake lock in locked audio recording mode.

Fixes #10098

app/src/main/java/org/thoughtcrime/securesms/conversation/ConversationActivity.java

@@ -400,6 +400,7 @@ public class ConversationActivity extends PassphraseRequiredActivity
   private ConversationGroupViewModel   groupViewModel;
   private MentionsPickerViewModel      mentionsViewModel;
   private GroupCallViewModel           groupCallViewModel;
+  private VoiceRecorderWakeLock        voiceRecorderWakeLock;
 
   private LiveRecipient recipient;
   private long          threadId;
@@ -432,6 +433,8 @@ public class ConversationActivity extends PassphraseRequiredActivity
       return;
     }
 
+    voiceRecorderWakeLock = new VoiceRecorderWakeLock(this);
+
     new FullscreenHelper(this).showSystemUI();
 
     ConversationIntents.Args args = ConversationIntents.Args.from(getIntent());
@@ -3033,12 +3036,14 @@ public class ConversationActivity extends PassphraseRequiredActivity
 
   @Override
   public void onRecorderLocked() {
+    voiceRecorderWakeLock.acquire();
     updateToggleButtonState();
     setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED);
   }
 
   @Override
   public void onRecorderFinished() {
+    voiceRecorderWakeLock.release();
     updateToggleButtonState();
     Vibrator vibrator = ServiceUtil.getVibrator(this);
     vibrator.vibrate(20);
@@ -3095,6 +3100,7 @@ public class ConversationActivity extends PassphraseRequiredActivity
 
   @Override
   public void onRecorderCanceled() {
+    voiceRecorderWakeLock.release();
     updateToggleButtonState();
     Vibrator vibrator = ServiceUtil.getVibrator(this);
     vibrator.vibrate(50);

app/src/main/java/org/thoughtcrime/securesms/conversation/VoiceRecorderWakeLock.kt

@@ -0,0 +1,50 @@
+package org.thoughtcrime.securesms.conversation
+
+import android.os.Build
+import android.os.PowerManager
+import androidx.activity.ComponentActivity
+import androidx.lifecycle.DefaultLifecycleObserver
+import androidx.lifecycle.LifecycleOwner
+import org.thoughtcrime.securesms.util.WakeLockUtil
+import java.util.concurrent.TimeUnit
+
+/**
+ * Holds on to and manages a wake-lock for the device proximity sensor.
+ *
+ * This class will register itself as an observe of the given activity's lifecycle and automatically
+ * release the lock if it holds one in onPause
+ */
+class VoiceRecorderWakeLock(
+  private val activity: ComponentActivity
+) : DefaultLifecycleObserver {
+
+  private var wakeLock: PowerManager.WakeLock? = null
+
+  init {
+    activity.lifecycle.addObserver(this)
+  }
+
+  fun acquire() {
+    synchronized(this) {
+      if (wakeLock?.isHeld == true) {
+        return
+      }
+
+      if (Build.VERSION.SDK_INT >= 21) {
+        wakeLock = WakeLockUtil.acquire(activity, PowerManager.PROXIMITY_SCREEN_OFF_WAKE_LOCK, TimeUnit.HOURS.toMillis(1), "voiceRecorder")
+      }
+    }
+  }
+
+  fun release() {
+    synchronized(this) {
+      if (wakeLock?.isHeld == true) {
+        wakeLock?.release()
+      }
+    }
+  }
+
+  override fun onPause(owner: LifecycleOwner) {
+    release()
+  }
+}