Add [soc|device|product]_specific

Added three properties (soc_specific, device_specific, and
product_specific) that shows what a module is specific to.

`soc_specific: true` means that the module is specific to an SoC
(System-On-a-Chip) and thus need to be installed to vendor partition.
This has the same meaning as the old `vendor: true` setting.

`device_specific: true` means that the module is specific to the entire
hardware configuration of a device includeing the SoC and off-chip
peripherals. These modules are installed to odm partition (or /vendor/odm
when odm partition does not exist).

`product_specific: true` means that the module is specific to the
software configuration of a product such as country, network operator,
etc. These modules are installed to oem partition (or /system/oem when
oem partition does not exist). These modules are assumed to be agnostic
to hardware, so this property can't be true when either soc_specific or
device_specific is set to true.

Bug: 68187740
Test: Build. path_tests amended.
Change-Id: I44ff055d87d53b0d2676758c506060de54cbffa0
diff --git a/android/variable.go b/android/variable.go
index 155eee5..6962b0f 100644
--- a/android/variable.go
+++ b/android/variable.go
@@ -174,6 +174,8 @@
 	CFIIncludePaths *[]string `json:",omitempty"`
 
 	VendorPath *string `json:",omitempty"`
+	OdmPath    *string `json:",omitempty"`
+	OemPath    *string `json:",omitempty"`
 
 	ClangTidy  *bool   `json:",omitempty"`
 	TidyChecks *string `json:",omitempty"`