Don't strip libraries for the Android benchmarks

Otherwise, the Android Studio "profile" option is much less useful.

java/android/benchmarks/build.gradle

@@ -36,6 +36,10 @@ android {
     }
 
     namespace "org.signal.libsignal.benchmarks"
+
+    packagingOptions {
+        doNotStrip '**/*.so'
+    }
 }
 
 dependencies {