[Android] Add sharding for AMP instrumentation tests.

build/android/devil/utils/parallelizer.py

Index: build/android/devil/utils/parallelizer.py
diff --git a/build/android/devil/utils/parallelizer.py b/build/android/devil/utils/parallelizer.py
index bac5b245fc48e0058a047effbfdb209c1e2cc104..ffd18c7e27b591b076ea0d292415a833e9e82ae7 100644
--- a/build/android/devil/utils/parallelizer.py
+++ b/build/android/devil/utils/parallelizer.py
@@ -182,7 +182,7 @@ class Parallelizer(object):
     return r
 
   def _assertNoShadow(self, attr_name):
-    """Ensures that |attr_name| isn't shadowing part of the wrapped obejcts.
+    """Ensures that |attr_name| isn't shadowing part of the wrapped objects.
 
     If the wrapped objects _do_ have an |attr_name| attribute, it will be
     inaccessible to clients.
@@ -239,4 +239,3 @@ class SyncParallelizer(Parallelizer):
     r = super(SyncParallelizer, self).pMap(f, *args, **kwargs)
     r.pFinish(None)
     return r
-