diff --git a/app/src/main/java/org/thoughtcrime/securesms/ApplicationContext.java b/app/src/main/java/org/thoughtcrime/securesms/ApplicationContext.java
index e04f05524c..4a2404e260 100644
--- a/app/src/main/java/org/thoughtcrime/securesms/ApplicationContext.java
+++ b/app/src/main/java/org/thoughtcrime/securesms/ApplicationContext.java
@@ -81,8 +81,6 @@ import org.webrtc.voiceengine.WebRtcAudioUtils;
 import org.whispersystems.libsignal.logging.SignalProtocolLoggerProvider;
 
 import java.security.Security;
-import java.util.HashSet;
-import java.util.Set;
 import java.util.concurrent.TimeUnit;
 
 /**
@@ -322,31 +320,11 @@ public class ApplicationContext extends MultiDexApplication implements AppForegr
 
   private void initializeRingRtc() {
     try {
-      Set<String> HARDWARE_AEC_BLACKLIST = new HashSet<String>() {{
-        add("Pixel");
-        add("Pixel XL");
-        add("Moto G5");
-        add("Moto G (5S) Plus");
-        add("Moto G4");
-        add("TA-1053");
-        add("Mi A1");
-        add("Mi A2");
-        add("E5823"); // Sony z5 compact
-        add("Redmi Note 5");
-        add("FP2"); // Fairphone FP2
-        add("MI 5");
-      }};
-
-      Set<String> OPEN_SL_ES_WHITELIST = new HashSet<String>() {{
-        add("Pixel");
-        add("Pixel XL");
-      }};
-
-      if (HARDWARE_AEC_BLACKLIST.contains(Build.MODEL)) {
+      if (RtcDeviceLists.hardwareAECBlocked()) {
         WebRtcAudioUtils.setWebRtcBasedAcousticEchoCanceler(true);
       }
 
-      if (!OPEN_SL_ES_WHITELIST.contains(Build.MODEL)) {
+      if (!RtcDeviceLists.openSLESAllowed()) {
         WebRtcAudioManager.setBlacklistDeviceForOpenSLESUsage(true);
       }
 
diff --git a/app/src/main/java/org/thoughtcrime/securesms/RtcDeviceLists.java b/app/src/main/java/org/thoughtcrime/securesms/RtcDeviceLists.java
new file mode 100644
index 0000000000..e7e6bf9e15
--- /dev/null
+++ b/app/src/main/java/org/thoughtcrime/securesms/RtcDeviceLists.java
@@ -0,0 +1,48 @@
+package org.thoughtcrime.securesms;
+
+import android.os.Build;
+
+import java.util.HashSet;
+import java.util.Set;
+
+/**
+ * Device hardware capability lists.
+ * <p>
+ * Moved outside of ApplicationContext as the indirection was important for API19 support with desugaring: https://issuetracker.google.com/issues/183419297
+ */
+final class RtcDeviceLists {
+
+  private RtcDeviceLists() {}
+
+  static Set<String> hardwareAECBlockList() {
+    return new HashSet<String>() {{
+      add("Pixel");
+      add("Pixel XL");
+      add("Moto G5");
+      add("Moto G (5S) Plus");
+      add("Moto G4");
+      add("TA-1053");
+      add("Mi A1");
+      add("Mi A2");
+      add("E5823"); // Sony z5 compact
+      add("Redmi Note 5");
+      add("FP2"); // Fairphone FP2
+      add("MI 5");
+    }};
+  }
+
+  static Set<String> openSlEsAllowList() {
+    return new HashSet<String>() {{
+      add("Pixel");
+      add("Pixel XL");
+    }};
+  }
+
+  static boolean hardwareAECBlocked() {
+    return hardwareAECBlockList().contains(Build.MODEL);
+  }
+
+  static boolean openSLESAllowed() {
+    return openSlEsAllowList().contains(Build.MODEL);
+  }
+}