Fix Android sample image fetching

Signed-off-by: Justin Georgi <justin.georgi@gmail.com>

src/pages/detect.vue

@@ -361,10 +361,13 @@
             resolve(reader.result)
           })
           if (this.imageLoadMode == 'sample') {
-            fetch(`../samples/${this.detectorName}-${searchImage}.jpeg`).then( resp => {
+            fetch(`${this.isCordova ? 'https://localhost' : '..'}/samples/${this.detectorName}-${searchImage}.jpeg`).then( resp => {
               return resp.blob()
             }).then(respBlob => {
               reader.readAsDataURL(respBlob)
+            }).catch((e) => {
+              console.log(e.message)
+              f7.dialog.alert(`Error loading image: ${e.message}`)
             })
           } else {
             const fileImage = this.$refs.image_chooser.files[0]