Fix mistake made when moving installmod from shell function standalone script

Bug: 355509078
Test: run installmod
Change-Id: I6ac58e8b2d58463f50eef54c6c29ce3bd399d0da

bin/installmod

@@ -28,7 +28,6 @@ if [[ $# -eq 0 ]]; then
     return 1
 fi
 
-local _path
 _path=$(outmod ${@:$#:1})
 if [ $? -ne 0 ]; then
     return 1
@@ -39,7 +38,7 @@ if [ -z "$_path" ]; then
     echo "Module '$1' does not produce a file ending with .apk (try 'refreshmod' if there have been build changes?)" >&2
     return 1
 fi
-local serial_device=""
+serial_device=""
 if [[ "$1" == "-s" ]]; then
     if [[ $# -le 2 ]]; then
         echo "-s requires an argument" >&2
@@ -48,7 +47,7 @@ if [[ "$1" == "-s" ]]; then
     serial_device="-s $2"
     shift 2
 fi
-local length=$(( $# - 1 ))
+length=$(( $# - 1 ))
 echo adb $serial_device install ${@:1:$length} $_path
 adb $serial_device install ${@:1:$length} $_path