Simplify MediaRoute2ProviderServiceProxy#shouldBind

In preparation for changes in the conditions that would
introduce further nesting.

Bug: b/263520343
Test: presubmit. This is a non-functional change.
Change-Id: I1271c39e8bfd65836f6cff4a4216d5d293a0308f
diff --git a/services/core/java/com/android/server/media/MediaRoute2ProviderServiceProxy.java b/services/core/java/com/android/server/media/MediaRoute2ProviderServiceProxy.java
index ae889d8..21e7bef 100644
--- a/services/core/java/com/android/server/media/MediaRoute2ProviderServiceProxy.java
+++ b/services/core/java/com/android/server/media/MediaRoute2ProviderServiceProxy.java
@@ -231,18 +231,21 @@
     }
 
     private boolean shouldBind() {
-        if (mRunning) {
-            boolean shouldBind =
-                    mLastDiscoveryPreference != null
-                            && !mLastDiscoveryPreference.getPreferredFeatures().isEmpty();
-            if (mIsSelfScanOnlyProvider) {
-                shouldBind &= mLastDiscoveryPreferenceIncludesThisPackage;
-            }
-            shouldBind |= mIsManagerScanning;
-            shouldBind |= !getSessionInfos().isEmpty();
-            return shouldBind;
+        if (!mRunning) {
+            return false;
         }
-        return false;
+        if (!getSessionInfos().isEmpty() || mIsManagerScanning) {
+            // We bind if any manager is scanning (regardless of whether an app is scanning) to give
+            // the opportunity for providers to publish routing sessions that were established
+            // directly between the app and the provider (typically via AndroidX MediaRouter). See
+            // b/176774510#comment20 for more information.
+            return true;
+        }
+        boolean anAppIsScanning =
+                mLastDiscoveryPreference != null
+                        && !mLastDiscoveryPreference.getPreferredFeatures().isEmpty();
+        return anAppIsScanning
+                && (mLastDiscoveryPreferenceIncludesThisPackage || !mIsSelfScanOnlyProvider);
     }
 
     private void bind() {