Move <uses-sdk /> to a differnt XML

Basically Android Studio does want targetSdkVersion to be specified in
build.gradle rather than AndroidManifest.xml.  To make both make build
and Android Studio build happy, this CL splits <uses-sdk /> from the
main AndroidManifest.xml to a different file and let them merged in
make build.

There should be no behavior change.

Bug: 110741422
Test: Manually verified that there is no difference in
      AndroidManifest.xml in the APK.
Change-Id: Ib673bca5a31b2f95329c9310a127ec0701bd8fdc
diff --git a/tests/Android.mk b/tests/Android.mk
index 7c0bb4f..23b0a93 100644
--- a/tests/Android.mk
+++ b/tests/Android.mk
@@ -19,6 +19,10 @@
 LOCAL_MODULE_TAGS := tests
 LOCAL_CERTIFICATE := shared
 
+LOCAL_FULL_LIBS_MANIFEST_FILES := \
+    $(LOCAL_PATH)/AndroidManifest.xml \
+    $(LOCAL_PATH)/AndroidManifest_SdkVersion.xml
+
 # Do not compress dictionary files to mmap dict data runtime
 LOCAL_AAPT_FLAGS += -0 .dict
 # Do not compress test data file