Decoded data from recv_all in packages to a string (Gallopsled#2237)

* Decoded data from recv_all in packages to a string

* Added sources for UTF-8 usage in Android

* Updated adb source

Author: fercevik729

pwnlib/adb/adb.py

@@ -1591,7 +1591,10 @@ def uninstall(package, *arguments):
 @context.quietfunc
 def packages():
     """Returns a list of packages installed on the system"""
-    packages = process(['pm', 'list', 'packages']).recvall()
+    # Decodes the received bytes as UTF-8 per:
+    # https://developer.android.com/reference/java/nio/charset/Charset#defaultCharset()
+    # where it is specified that UTF-8 is the default charset for Android.
+    packages = process(['pm', 'list', 'packages']).recvall().decode('utf-8')
     return [line.split('package:', 1)[-1] for line in packages.splitlines()]
 
 @context.quietfunc