fix: fix doNotStrip property not working

Author: 0xbrayo

gradle.properties

@@ -15,3 +15,6 @@ org.gradle.jvmargs=-Xmx1536m
 kotlin.code.style=official
 android.useAndroidX=true
 android.enableJetifier=true
+
+# Enable native symbol preservation for debugging
+# doNotStrip=true

mobile/build.gradle

@@ -58,11 +58,14 @@ android {
 
     namespace 'net.activitywatch.android'
     // Never got this to work...
-    //if (project.hasProperty("doNotStrip")) {
-    //    packagingOptions {
-    //        doNotStrip '**/*.so'
-    //    }
-    //}
+    if (project.hasProperty("doNotStrip")) {
+        println "Configuring doNotStrip for jniLibs"
+        packaging {
+            jniLibs {
+                keepDebugSymbols += "**/*.so"
+            }
+        }
+    }
 
     // Creates a resource versionName with the full version
     // https://stackoverflow.com/a/36468650/965332