Renderscript: change extension .rs to .rscript

Reserve .rs extension for Rust.

Bug: 137365032
Test: make checkbuild
Test: cd frameworks/compile/slang/tests
    ./slang_tests.py
Test: atest CtsRenderscriptTestCases
Test: CtsRsCppTestCases

Exempt-From-Owner-Approval: Clean CP
Change-Id: Ibfccb4f52b74f9ac95c373f48d775254ba77288d
Merged-In: Ibfccb4f52b74f9ac95c373f48d775254ba77288d
(cherry picked from commit 480864f1b013ef4d103ce76cfebb7404f339ae61)
(cherry picked from commit f9b4f4b3e4c8ba8e6c516d26c208746ae747049f)
diff --git a/core/binary.mk b/core/binary.mk
index e76942c..5d2f965 100644
--- a/core/binary.mk
+++ b/core/binary.mk
@@ -574,7 +574,7 @@
 ## Compile RenderScript with reflected C++
 ####################################################
 
-renderscript_sources := $(filter %.rs %.fs,$(my_src_files))
+renderscript_sources := $(filter %.rscript %.fs,$(my_src_files))
 
 ifneq (,$(renderscript_sources))
 my_soong_problems += rs
@@ -618,7 +618,7 @@
 endif
 
 bc_dep_files := $(addprefix $(renderscript_intermediate)/, \
-    $(patsubst %.fs,%.d, $(patsubst %.rs,%.d, $(notdir $(renderscript_sources)))))
+    $(patsubst %.fs,%.d, $(patsubst %.rscript,%.d, $(notdir $(renderscript_sources)))))
 
 $(RenderScript_file_stamp): PRIVATE_RS_INCLUDES := $(renderscript_includes)
 $(RenderScript_file_stamp): PRIVATE_RS_CC := $(LOCAL_RENDERSCRIPT_CC)
@@ -636,7 +636,7 @@
 LOCAL_INTERMEDIATE_TARGETS += $(RenderScript_file_stamp)
 
 rs_generated_cpps := $(addprefix \
-    $(renderscript_intermediate)/ScriptC_,$(patsubst %.fs,%.cpp, $(patsubst %.rs,%.cpp, \
+    $(renderscript_intermediate)/ScriptC_,$(patsubst %.fs,%.cpp, $(patsubst %.rscript,%.cpp, \
     $(notdir $(renderscript_sources)))))
 
 $(call track-src-file-gen,$(renderscript_sources),$(rs_generated_cpps))