Change Python in Soong to support device side build.

Add python_test to generate executables for both host and device side.
And change python_library_host to python_library.

installation for python device test will be under
target/product/generic_arm[64]/data/nativetest[64].

Bug: b/69114465
Test: m clean && m -j
Device Test:
adb root; adb push nan_devicetest /data;
adb shell; ./nan_devicetest
print(sys.path)
['/data/nan_devicetest/runfiles', '/data/nan_devicetest', '/data/nan_devicetest/internal', '/data/nan_devicetest/internal/stdlib']

Change-Id: If8317070a3aa1b6dab2e84b8df2d037f495d7247
diff --git a/python/androidmk.go b/python/androidmk.go
index 4c94450..5fa01ab 100644
--- a/python/androidmk.go
+++ b/python/androidmk.go
@@ -39,7 +39,7 @@
 }
 
 func (p *Module) AndroidMk() android.AndroidMkData {
-	ret := android.AndroidMkData{}
+	ret := android.AndroidMkData{OutputFile: p.installSource}
 
 	p.subAndroidMk(&ret, p.installer)
 
@@ -55,7 +55,7 @@
 				strings.Join(p.binaryProperties.Test_suites, " "))
 		}
 	})
-	base.subAndroidMk(ret, p.baseInstaller)
+	base.subAndroidMk(ret, p.pythonInstaller)
 }
 
 func (p *testDecorator) AndroidMk(base *Module, ret *android.AndroidMkData) {
@@ -67,7 +67,7 @@
 				strings.Join(p.binaryDecorator.binaryProperties.Test_suites, " "))
 		}
 	})
-	base.subAndroidMk(ret, p.binaryDecorator.baseInstaller)
+	base.subAndroidMk(ret, p.binaryDecorator.pythonInstaller)
 }
 
 func (installer *pythonInstaller) AndroidMk(base *Module, ret *android.AndroidMkData) {