Delete __ANDROID_APEX_MIN_SDK_VERSION__ from Soong

Currently, Bazel sets __ANDROID_APEX_MIN_SDK_VERSION__ based on the cc library's min_sdk_version while Soong does based on apex's min_sdk_version. This causes a diff in the clang commands.

Digging further, we realized __ANDROID_APEX_MIN_SDK_VERSION__ isn't used anywhere so we might just delete it altogether instead of fixing it.

Bug: 265134933
Test: presubmit
Change-Id: I08e89dc8f6ef86669248ea5c47de6603e9d2ffbb
diff --git a/apex/apex_test.go b/apex/apex_test.go
index 33fce7c..3ce9176 100644
--- a/apex/apex_test.go
+++ b/apex/apex_test.go
@@ -3329,17 +3329,14 @@
 	// non-APEX variant does not have __ANDROID_APEX__ defined
 	mylibCFlags := ctx.ModuleForTests("mylib", "android_arm64_armv8-a_static").Rule("cc").Args["cFlags"]
 	ensureNotContains(t, mylibCFlags, "-D__ANDROID_APEX__")
-	ensureNotContains(t, mylibCFlags, "-D__ANDROID_APEX_MIN_SDK_VERSION__")
 
-	// APEX variant has __ANDROID_APEX__ and __ANDROID_APEX_SDK__ defined
+	// APEX variant has __ANDROID_APEX__ and __ANDROID_APEX__ defined
 	mylibCFlags = ctx.ModuleForTests("mylib", "android_arm64_armv8-a_static_apex10000").Rule("cc").Args["cFlags"]
 	ensureContains(t, mylibCFlags, "-D__ANDROID_APEX__")
-	ensureContains(t, mylibCFlags, "-D__ANDROID_APEX_MIN_SDK_VERSION__=10000")
 
-	// APEX variant has __ANDROID_APEX__ and __ANDROID_APEX_SDK__ defined
+	// APEX variant has __ANDROID_APEX__ and __ANDROID_APEX__ defined
 	mylibCFlags = ctx.ModuleForTests("mylib", "android_arm64_armv8-a_static_apex29").Rule("cc").Args["cFlags"]
 	ensureContains(t, mylibCFlags, "-D__ANDROID_APEX__")
-	ensureContains(t, mylibCFlags, "-D__ANDROID_APEX_MIN_SDK_VERSION__=29")
 
 	// When a cc_library sets use_apex_name_macro: true each apex gets a unique variant and
 	// each variant defines additional macros to distinguish which apex variant it is built for
@@ -3348,19 +3345,17 @@
 	mylibCFlags = ctx.ModuleForTests("mylib3", "android_arm64_armv8-a_static").Rule("cc").Args["cFlags"]
 	ensureNotContains(t, mylibCFlags, "-D__ANDROID_APEX__")
 
-	// recovery variant does not set __ANDROID_APEX_MIN_SDK_VERSION__
+	// recovery variant does not set __ANDROID_APEX__
 	mylibCFlags = ctx.ModuleForTests("mylib3", "android_recovery_arm64_armv8-a_static").Rule("cc").Args["cFlags"]
 	ensureNotContains(t, mylibCFlags, "-D__ANDROID_APEX__")
-	ensureNotContains(t, mylibCFlags, "-D__ANDROID_APEX_MIN_SDK_VERSION__")
 
 	// non-APEX variant does not have __ANDROID_APEX__ defined
 	mylibCFlags = ctx.ModuleForTests("mylib2", "android_arm64_armv8-a_static").Rule("cc").Args["cFlags"]
 	ensureNotContains(t, mylibCFlags, "-D__ANDROID_APEX__")
 
-	// recovery variant does not set __ANDROID_APEX_MIN_SDK_VERSION__
+	// recovery variant does not set __ANDROID_APEX__
 	mylibCFlags = ctx.ModuleForTests("mylib2", "android_recovery_arm64_armv8-a_static").Rule("cc").Args["cFlags"]
 	ensureNotContains(t, mylibCFlags, "-D__ANDROID_APEX__")
-	ensureNotContains(t, mylibCFlags, "-D__ANDROID_APEX_MIN_SDK_VERSION__")
 }
 
 func TestHeaderLibsDependency(t *testing.T) {