Rename common to android

Rename the "common" package to "android", because common is too
generic.  Also removes all android.Android naming stutter.

Ran:
gomvpkg -from 'android/soong/common' -to 'android/soong/android'
gorename -from '"android/soong/android".AndroidModuleContext' -to 'ModuleContext'
gorename -from '"android/soong/android".AndroidBaseContext' -to 'BaseContext'
gorename -from '"android/soong/android".AndroidModuleBase' -to 'ModuleBase'
gorename -from '"android/soong/android".AndroidBottomUpMutatorContext' -to 'BottomUpMutatorContext'
gorename -from '"android/soong/android".AndroidTopDownMutatorContext' -to 'TopDownMutatorContext'
gorename -from '"android/soong/android".AndroidModule' -to 'Module'

Change-Id: I3b23590b8ce7c8a1ea1139411d84a53163288da7
diff --git a/java/androidmk.go b/java/androidmk.go
index 6d4dddf..9ffd35f 100644
--- a/java/androidmk.go
+++ b/java/androidmk.go
@@ -17,17 +17,17 @@
 import (
 	"fmt"
 
-	"android/soong/common"
+	"android/soong/android"
 )
 
-func (*JavaLibrary) AndroidMk() (ret common.AndroidMkData, err error) {
+func (*JavaLibrary) AndroidMk() (ret android.AndroidMkData, err error) {
 	ret.Class = "JAVA_LIBRARIES"
 	// TODO
 	err = fmt.Errorf("Not yet implemented")
 	return
 }
 
-func (*JavaPrebuilt) AndroidMk() (ret common.AndroidMkData, err error) {
+func (*JavaPrebuilt) AndroidMk() (ret android.AndroidMkData, err error) {
 	ret.Class = "JAVA_LIBRARIES"
 	// TODO
 	err = fmt.Errorf("Not yet implemented")